Guild Wars 2

Guild Wars 2 - Fan Site

Search

 

Pages

Introducing the World Tournament Series finalists

6:18 pm, November 21, 2014 On December 5, the top four PvP teams in GuildWars2 will go head-to-head at the World Tournament Series Championship event in Beijing, China, all vying for the lion’s share of the $50,000 pr [..] View

Go with the Flow

6:18 pm, November 21, 2014 Match flow in PvP is affected by everything from team formation and arena queuing to the way players actually enter matches. I’m happy to announce that the process players use to enter PvP a [..] View

Points of Interest is live on Twitch this week

6:18 pm, November 20, 2014 Peter looks thrilled. Rubi and Teddy look frightened. With a planning session like that, this week’s Points of Interest might be the first to make Rubi wish for a mute button-which should [..] View

Finding the perfect match

6:18 pm, November 20, 2014 Hello, world! My name is Justin O’Dell, and I’m one of the server programmers on the Structured Player vs. Player (sPvP) team. I’m here to talk to you about the upcomin [..] View

Announcing Improvements to PvP and the Ladder Test Season

6:18 pm, November 19, 2014 Hello, Tyrians! We’re very pleased to announce that on December 2 we will be releasing some major updates to PvP that will enhance and improve a number of areas of the PvP experience. Matc [..] View

Living Story.......One step closer.....to Exit

6:18 pm, November 19, 2014 Ok, i`m one of those uber persistant  guys who goes beyound 100% when he puts his mind into something.As long time GW player and fan i was in 7th heaven when i heard about GW2 being [..] View

Jungle Explorer Outfit, Pact Fleet Weapons, and Regional Tournament Finishers in the Gem Store!

6:18 pm, November 18, 2014 The Silverwastes may be a tangle, but with our new Jungle Explorer Outfit and Pact Fleet Weapons, the Black Lion Trading Company has everything you need to clear a path in style! And let&#8217 [..] View

The ESL Go4GuildWars2 Cups Are Heating Up

6:18 pm, November 14, 2014 If I had to sum up November’s ESL Go4GuildWars2 Cups in a few words, I’d describe it as entirely unexpected. The November Cup isn’t even half over, and yet we’v [..] View

GW2: Master of Salami Slicing

6:18 pm, November 13, 2014 (Please note that the following post could not be posted on the Official Forums, due to me being banned from creating new threads.  If you'd like to repost this in the official forum [..] View

Where did Blizzard go wrong with D3 and what A.Net could learn from it.

6:18 pm, November 12, 2014 This week's Blizzcon brought us a panel on D3. A quick summary: http://www.diablofan...ouls-panel-live A few things that stand out and seem very similar to what we are experiencing in GW2 (stole [..] View

Watch Points of Interest episode 10: Echoes of the Past today!

6:18 pm, November 7, 2014 Season 2 resumed on Tuesday and theres a lot of exciting content to play through. Points of Interest is back this week with talk about Echoes of the past! Rubis going to spend some time with GuildWars [..] View

Adopt-a-Dev was a Blast

6:18 am, November 1, 2014 Hello Tyrians, A few weeks ago, some of us on the WvW team were chatting about how we can better connect with the community, and we came up with the idea of joining different guilds in different leag [..] View

Guild Wars 2 and ESL Partner on Cash-Prize PvP Tournament

6:18 pm, October 29, 2014 The Guild Wars 2 team, in partnership with ESL, is proud to announce the Go4GuildWars2 Cup,a new series of weekly PvP cups that are open to all participants. PvP teams will fight eac [..] View

Join Us in Celebrating the World Tournament Series Invitational Qualifier Tournament this Weekend!

7:18 pm, October 24, 2014 Only this weekend’s World Tournament Series Invitational Qualifier stands between the top PvP teams in Guild Wars 2 and the Finals event in Beijing, China, where players fr [..] View

Overwolf Contest Results!

7:18 pm, October 17, 2014 Greetings, Tyrians! You fought, you flipped, you streamed! And now, at the end of the World vs. World Streaming Contest with Overwolf, we have our winners: First PlaceChemsorly Second Placeshinry [..] View

Halloween Outfit, Minis, and Finishers in the Gem Store!

7:18 pm, October 14, 2014 As the month plods on and we grow closer to that eerie time when the barrier between our world and the next wanes, the Black Lion Trading Company is showing the Mad King’s influence more [..] View

Come celebrate the 50th ESL Weekly Cup this Thursday!

7:18 pm, October 8, 2014 We’d like to cordially invite you to join us tomorrow in celebrating the 50th tournament of the ESL Weekly Cup a PvP tournament hosted by our community organizers and shoutcasters each week, [..] View

Reminder: Participate in the Overwolf World vs. World Streaming and War ReporterContests

7:18 pm, September 30, 2014 After our successful partnership on the Overwolf WvW App Challenge, which saw player Prefrontal Cortex win a $2,000 cash prize and a lot of Guild Wars 2 goodies, weve partnered with [..] View

World Tournament Series Finals Dated and Slated

7:18 am, September 27, 2014 The Guild Wars 2 World Tournament Series will name a champion this December in China! Its our first truly international tournament, bringing together top PvP teams from North America, Europe and Chin [..] View

Guild Wars 2 at EurogamerExpo

7:18 pm, September 18, 2014 Guild Wars 2 is headed to Eurogamer Expo! Since our livestreaming crew will be at Eurogamer, were not going to have our regular 12:00 p.m. PT livestreams on September 19 and Octobe [..] View

The game's content is poorly distributed, while its progression is simply lacking

7:18 am, September 18, 2014 With the New Player Experience (the NPE), A.Net set out to redistribute the game's progression, in hopes of making the game more appealing. My core issue with this idea is that they focused on a syste [..] View

The game's content is poorly distributed, while its progression is simply lacking.

7:18 pm, September 17, 2014 With the New Player Experience (the NPE), A.Net set out to redistribute the game's progression, in hopes of making the game more appealing. My core issue with this idea is that they focused on a syste [..] View

GW2: a true successor to GW1

7:18 pm, September 16, 2014 Hi, http://www.guildwars...-t10297855.html Those who cannot learn from history are doomed to repeat it. Moderator Note: The post linked talks about how making changes to a game's systems that run c [..] View

Roundup: World vs. World Community Videos

7:18 pm, September 10, 2014 A few weeks ago, we launched a call to arms to the WvW community, asking them for the best video footage they created. We received an overwhelming response from the WvW players of Guild Wars& [..] View

Introducing the New TradingPost

7:18 pm, September 4, 2014 As part of the upcoming feature pack for Guild Wars 2, well be shipping a change thats been a long time in the making: a brand-new Trading Post! Weve put a lot of work into it to str [..] View

Thoughts on the September Feature Pack?

7:18 am, August 29, 2014 I don't feel like they're at all addressing any of the actual needs of the game. New backpacks, a cleaner crafting UI, and new commander colors are all very nice things. But where is precursor craftin [..] View

A Fresh Start: The New Player Experience in GuildWars2

7:18 pm, August 28, 2014 Hey, folks, As we continue to grow Guild Wars 2 and plan our next steps for the future of the game, its important we have a solid foundation for all the new players we plan to welcom [..] View

Congratulations to Europe for winning the GuildWars2 International All-Stars Tournament!

7:18 pm, August 27, 2014 Wed like you to join us in congratulating the European All-Stars team for their flawless showing at the Guild Wars 2 International All-Stars Tournament at gamescom in Cologne, German [..] View

September 2014 Feature Pack: Improvements Galore

7:18 pm, August 26, 2014 Hello, everybody, Im Isaiah Cartwright, the lead game designer on Guild Wars 2. Im going to be introducing you to three of the changes to Guild Wars 2 coming up in [..] View

Win a Mini Llama during the Tournament of Legends 2 Finals thisweekend!

7:18 pm, August 22, 2014 This weekend, play witness to the finals of the biggest tournament in Guild Wars and Guild Wars 2 history! The Tournament of Legends 2 started with a total of 256 teams, and [..] View

How Would You Change "X" World Boss?

7:18 pm, August 19, 2014 So my server successfully downed Tequatl today. It was the first time I personally had even attempted the revamped boss since returning to the game and it was AWESOME. That single win was far more gr [..] View

Points of Interest Episode 5

7:18 pm, August 14, 2014 On tomorrows episode of Points of Interest, Guild Wars 2 game designer Leif Chappelle and writer Peter Fries are joining Kate for a developers-eye view of The Dragons Reach: Part 2 [..] View

PvP Visual and RewardUpdates

7:18 pm, August 14, 2014 The September 2014 Feature Pack, which we announced yesterday along with our World Tournament Series, is bringing exciting additions to PvP! Today, well be talking about two of our additions aimed at [..] View

Announcing the GuildWars2 World Tournament Series

7:18 pm, August 13, 2014 The Guild Wars 2 team, along with Kong Zhong, our publishing partner in China, is proud to announce the Guild Wars 2 World Tournament Series, an international compe [..] View

2nd Anniversary Predictions

7:18 pm, July 31, 2014 Within less than a month it will have been two years since GW2 released. What do you expect or would like ANet to do? Considering the patch tuesdays fall onto 12th and 26th, I assume we'll get the Dr [..] View

Quality in GW2?

7:18 pm, July 28, 2014 I was reading posts on the usual Trahearn-hate threads, and one person said "Quality is relative."  So I thought, what is good quality in an MMO; and where does GW2 lie in [..] View

Introducing the Roster for the Guild Wars 2 International All-Stars Tournament

7:18 am, July 26, 2014 The All-Star votes have been tallied! Were ready to introduce the PvP players who will represent their regions at the Guild Wars 2 International All-Stars Tournament during gamescom [..] View

On YouTube: Points of Interest Episode 3

7:18 pm, July 23, 2014 Last weeks episode of Points of Interest is available on our YouTube channel now! Take a look at the video to catch up on all of last Fridays fun: Kate is joined by Tami Foote, Josh Foreman, and Pet [..] View

Points of Interest Episode 3

7:18 am, July 17, 2014 Entanglement is live Guild Wars 2, and were ready to talk it over on Points of Interest! Our host Kate Welch is joined by writer Peter Fries, environment artist Tami Foote, and Env [..] View

Points of Interest Episode 2

7:18 pm, July 16, 2014 Entanglement is live Guild Wars 2, and were ready to talk it over on Points of Interest! Our host Kate Welch is joined by writer Peter Fries, environment artist Tami Foote, and Env [..] View

Don't you dare, ANet! [slight patch spoiler]

7:18 pm, July 15, 2014 Just started playing today's patch and this is the second dialog I saw. Maybe it will get clarified later, but if this turns out to be another chapter of Trahearne's story, I feel that a good portio [..] View

Your Vote Decides the GuildWars2 International All-StarsTeams!

7:18 pm, July 10, 2014 Hello Tyria, Joshua “Grouch” Davis here, Competitive Events Manager at ArenaNet. Its my privilege to announce that at this years gamescom, well be partnering with our friends at [..] View

On YouTube: Points of Interest Episode 2

7:18 pm, July 9, 2014 If you werent able to check out Episode 2 of Points of Interest last Friday, the video is available now on the Guild Wars 2 YouTube channel. Our host Kate Welch is joined by Narrat [..] View

I think they snuck something new into Gendarran Fields...

7:18 am, June 18, 2014 Could be I just haven't been there in ages, but i thought i'd remember something thisodd. https://www.youtube.com/watch?feature=player_embedded&v=D0b6P0cHtzM View

I'm here couse of censorship

7:18 pm, June 10, 2014 Hi o/ I wrote on the official forum asking for a link to a free forum about guild wars 2 without censorship and zealot CMs. The post got obviously removed and i got signed for infraction. As all the [..] View

Buy Custom Arenas withGold!

7:18 am, June 10, 2014 Were pleased to announce that from June 17 onward, youll be able to buy custom arenas with gold instead of gems! We have always seen custom Arenas as an important tool for bringing the PvP community [..] View

GuildWars2 Launches inChina May 15

7:18 am, May 14, 2014 Were happy to announce that weve reached another major milestone for Guild Wars 2: the game officially launches in China on May 15 at 10:18 a.m. Beijing time! A massive event in Beij [..] View

GuildWars2 Launches inChina

7:18 pm, May 13, 2014 Today were happy to announce that weve reached another major milestone for Guild Wars 2: the game has officially launched in China. A massive event in Beijing today marked the moment [..] View

Proposal to pause Living Story for more content patches

7:18 am, May 13, 2014 Hi, I'm a fairly casual player and just wanted to make a suggestion. Overall, I really enjoy how GW2 is free to play and has regular updated content. I really like the previous April patch in that it [..] View

The new daily system.

7:18 pm, May 10, 2014 It kind of sucks, doesn't it? I am very much a fan of the unification of the daily system: I love the idea of being able to finish the daily by not being forced into a single mode. But at the same ti [..] View

The Megaserver Rollout isComplete!

9:16 pm, April 25, 2014 Were pleased to announce that now all PvE maps and the Heart of the Mists have been moved over to megaserver technology! Although were excited that you have more players than ever to explore the open [..] View

Looking for GW2 writers for gaming website

9:16 pm, April 19, 2014 Hello GW2 players. My name is Kellth and i recently have launched a news/blog website about video games. Currently we are covering two video games for we only cover games we are passionate about. We a [..] View

Tournament of LegendsUpdate

3:16 pm, April 19, 2014 Thank you all for such an overwhelming turnout to the Tournament of Legends! Weve seen well over 200 teams register to battle it out for their chance at a legendary weapon! Because the community came [..] View

Eliminate Wardrobe Charges and Improve BLC's

9:16 am, April 16, 2014 In the new wardrobe Anet wants us to buy new transmutation charges.  But I feel Anet can make plenty of money without these charges. How?  Improve the BLC rewards. [..] View

Black Lion Tickets

9:16 pm, April 12, 2014 In a recent, now locked, thread I tried to discuss the objective definition of pay-to-win, and quickly found that for various reasons doing so is.difficult, to say the least. So rather than rehash tha [..] View

Foostival 2014, a Celebration

9:16 pm, April 9, 2014 The Foostival event, originally held in 2013 in Paris, was created by fans, for fans, to bring many different Guild Wars 2 communities together. Last years Foostival was a success, a [..] View

Restrict Mounts to NPC/Enemy lore

9:16 am, April 7, 2014 Restrict Mounts to NPC/Enemy lore This post is in support of mounts in GW2.  BUT to restrict mounts to NPC's and enemies.   This would exclude small cosmetic toy [..] View

Pay-to-win

3:16 am, April 3, 2014 A lot of the pay-to-win arguments Ive seen lately stink of what I call subjective advantage. It was summed up best in a recent thread I shall link at the end of this post. In a nut shell the purposed [..] View

Cash->Gem<->Gold Conversion

9:16 pm, April 2, 2014 Forked from here.  Quoted for context. Mordakai, on 02 April 2014 - 02:40 PM, said:So, Raspberry brings probably the most controversial aspect of GW2 up:  buying a [..] View

Introducing the MegaserverSystem

3:16 pm, April 2, 2014 Were down to the last major feature to announce in our upcoming April 15 Feature Pack, and its a pretty huge one: were making it easier to play with your friends on every PvE map, regardless of home w [..] View

Announcing the GuildWars2 Tournament of Legends

9:16 pm, April 1, 2014 Greetings fellow Tyrians! Allie Murdock here; Community Coordinator at ArenaNet. Im excited to announce our first GuildWars2 Tournament of Legends on April 26-27 for Europe and May 3-4 for North Ameri [..] View

PvP Reward Tracks and GearUnification

8:16 pm, March 28, 2014 Hello again Tyria! There are a lot of great new changes happening in the Mists with rewards, gear, build-making, and more! Its incredibly exciting to finally be able to share with you all of the updat [..] View

Account-Bound WXP, Legendaries, and AscendedGear

8:16 pm, March 27, 2014 We’re using the April 2014 Feature Pack as an opportunity to introduce some improvements that we’re really excited for: account-bound World XP and ascended and legendary gear! We w [..] View

Say Goodbye to Armor Repair Costs and Hello to Free TraitResets

8:16 pm, March 27, 2014 Were implementing some changes in the upcoming feature patch to the economy and want to tell you about them now. Were excited about what these alterations will mean for the game. The End of Repair Co [..] View

Wardrobe System+Charges=cluttered bank

8:16 pm, March 25, 2014 Wardrobe System This new Wardrobe System will still result in cluttered bank space for many players.  As they will not want to use multiple Transmutation Charges on the same item to [..] View

Introducing the WardrobeSystem

2:16 pm, March 25, 2014 One of the many exciting features coming in the April 2014 Feature Pack is the new Wardrobe, an account-wide system that allows you to collect every skin in the game! Account Wardrobe: The Basics [..] View

Do you feel empowered?

2:16 am, March 25, 2014 Honest question. I've been gaming for years now and one thing that i've seen Blizzard struggle with over the years (or something they try to emphasize on) is to make the player feel "empowered&q [..] View

Runes, Sigils, and BalanceUpdates

8:16 pm, March 21, 2014 Yesterday we introduced you to some of the upcoming changes to the traits system. Those changes, while exciting, are just one part of the balance updates bundled into the April 2014 Feature Pack! Toda [..] View

Learn About Critical DamageChanges

8:16 pm, March 21, 2014 One of the balance changes coming in the April 2014 Feature Pack is the introduction of ferocity, a brand new stat that will affect your critical damage. Ferocity is being introduced to make bonus cri [..] View

Traits Unleashed: Forty New Traits and More!

2:16 pm, March 20, 2014 Hello there! I’m Roy Cronacher, and as a game designer for ArenaNet, I’m excited to tell you about upcoming changes to the trait system. These changes focus on improving the ease o [..] View

The Trinity, Roles, GW2, and You

8:16 pm, March 19, 2014 I'm now genuinely curious what the psychological attachment to the Trinity is. GW2 does not have the typical Holy Trinity and throughout many of the threads here there seems to be some form of attachm [..] View

Hackers, WvW Season II and Anet's apathy

8:16 am, March 19, 2014 WvW has always had it's share of hackers but it seems that this issue has became more dire lately. It's no longer just one or two flying mesmers per month. Now some fights are plagued by perma invisib [..] View

Will Arena Net just let Guild Wars 2 die?

8:16 am, March 19, 2014 I know how absurd that sounds, and there was a time not long ago I would have been among the first to dismiss it. This morning in fact. But things that have happened and been said as of this newest pa [..] View

Why Healing Power Sucks, By WoodenPotato's (also bad mob design)

8:16 pm, March 14, 2014 Reddit thread: http://www.reddit.co...ng_power_sucks/ tso said:The problem is not the numbers, it is the ham fisted mob design. We can see this clearly when a mob gets zerg scaled, as it magnifies [..] View

Just something I noticed

8:16 am, March 7, 2014 So Arena Net said that they would be addressing the issue of condition builds being completely outclassed by direct damage builds in all forms of content. Now they have released a patch featuring thr [..] View

In the end I just wish Arena Net would finish Guild Wars 2

2:16 am, March 2, 2014 And so we come to the close; the end of Living World Season 1. And as I contemplate how Arena Net is likely to ruin the one thing that quite a number of us are hoping for from this event (an end to th [..] View

Why endurance over skill ?

2:16 am, February 27, 2014 First things first,you don't need  nor its beneficial to have endurance in real life to play video games. You needed for sports,driving,fishing,working and maybe even knitting,but no [..] View

CDI: Fractals

8:16 pm, February 25, 2014 https://forum-en.guildwars2.com/forum/game/gw2/CDI-Fractal-Evolution/first This I take a bit of an issue with.  Its one thing to solicit information on classes.  I [..] View

Damage Downtime as a Component in DPS Calculation?

2:16 am, February 24, 2014 What is Damage Downtime?: DDT is the time spent not attacking that is unrelated to an attack's central action window. What increases DDT?: Dodges, Movement, Knockdowns, Interrupts, Fear, etc. Why ca [..] View

Living Story Vs Personal Story

8:16 am, February 22, 2014 One of the most laziest thing I have EVER. I mean EVER saw. The patch itself to the city. Its awesome. It leaves you wanting more. But when you are doing the personal story for the first time or for t [..] View

Do you think GW2 players are stupid customers?

8:16 pm, February 21, 2014 In many threads here I keep coming across a baseline conspiracy theory which is that Anet is bleeding people dry of their money and they are doing it successfully because ... Well that's where the log [..] View

How does Arena Net gague the popularity of Living Story?

2:16 pm, February 20, 2014 This is a tie-in thread to my existing karma thread. There is a link and you'll understand where I'm going with this after we all ask the vital question (cangemsfixlivingstory?): How does ANet gague [..] View

Results of international Guild Wars 2 survey

2:16 pm, February 18, 2014 Hello, Some of you may remember a survey which has been done by GameStatistics on September 2013, about Guild Wars 2 players opinions about the game. The link for the survey had been put on Guild war [..] View

Whaaaat? No karma? Heeeere

8:16 pm, February 17, 2014 Since the dissolution of karma in dungeons, there are now only three places in which to seriously gain karma: 1. Tequatl 2. lower-level fractals (I think 10 levels below your personal reward yields m [..] View

Why Being Efficient is the Only Thing Left

8:16 am, February 17, 2014 I read the quote below today and it struck a nerve that has been lingering for a while. Why is it that the only real difference in this game between casual and hardcore seems to be efficiency? I know [..] View

Do You Consider GW2 to be a "DPS Race"?

2:16 am, February 17, 2014 Considering the playstyles and management of damage it is easy to get this impression for players but I want to know whether it is reasoned or not. Do you believe it is a DPS Race? Why or why not? Are [..] View

What advice would you give new players trying to learn the ropes?

8:16 am, February 14, 2014 For this keep it "in game" so no snide "I'd say DON'T PLAY DUH!?"; spare your hatred. An Example: I would tell new players that one of the core mechanics to master is dodging an [..] View

Friendly fire

2:16 pm, February 13, 2014 I know I have brought this up before but I have a new take on it and was wondering what people think of it. So friendly fire is when an attack you make damages characters on your own side. Nothing to [..] View

Should all the older World Bosses be updated again?

2:16 am, February 10, 2014 Are the world bosses hard enough for the player base? Do they need to grow because the base has grown in skill and now swats them like flies? View

CGDP-Building content for the game

2:16 pm, February 5, 2014 Hi. I have an ideea, of users creating content that could be implemented in Guild Wars 2. I oppened a topic here: https://forum-en.guildwars2.com/forum/game/gw2/Player-Made-content  &nb [..] View

Outsourced Development?

8:16 pm, February 3, 2014 So a comment I read struck me as interesting earlier today.  The concept that ArenaNet outsources parts of its development.  Now, these concepts are nothing new in [..] View

Dev for a Day: Condition Damage

2:16 pm, February 3, 2014 The purpose of this thread is to discuss Condition Damage in the game whether you think it's fine, is completely broken, or could just be tweaked to be more useful. My thoughts: Instead of a global [..] View

The most important thing (opinions)

8:16 am, February 1, 2014 Edit: Thanks much to Konzacelt for posting this on the official forms for me. Heres the link if you want to follow or partake in the discussion there. https://forum-en.guildwars2.com/forum/game/gw2/T [..] View

Thoughts on Non-replayability of PS and LS?

8:16 am, February 1, 2014 First off, I realize ANet is striving for a "Living World."  And that to ANet that means story elements are supposed to be realistic in the sense that once they happen they [..] View

Your opinion about PvP bans over missed Solo Tournaments

2:16 pm, January 31, 2014 Well, this is the kind of 'ban' I am talking about. I actually wrote a thread about this in reddit, but I'm not going to lie - it went terrible. The backstory is that I accidentally failed to enter [..] View

Presuming you made it to level 80 once ...

8:16 am, January 31, 2014 So I asked a bit about leveling and read a bit about leveling in various places and the word "grind" comes up. I can understand grind in relation to repetition; once you play a game you've p [..] View

World vs. World Queue Improvements

2:16 am, January 31, 2014 On Tuesday, February 4, were releasing the new Edge of the Mists WvW map and major improvement to the queuing system for WvW. Weve been doing some behind-the-scenes work on our systems to provide more [..] View

Just one more reason Im growing to hate Arena Net

8:16 pm, January 29, 2014 So Ive spent the last few months raising a new alt with intent of making him my new main. A ranger, my old preferred class in GW1, and Ive been loving it. Of course I need a great new look for him, be [..] View

Another PUG Experience

8:16 pm, January 24, 2014 So, today I was pugging for a CoF P1 run (yes, CoF P1, that's how serious this issue is) and clearly stated in the LFG that the requirements were that the people joining for using a zerker setup and w [..] View

Upcoming Guild Wars 2 PvP Community Tournament Events

8:16 pm, January 23, 2014 Looking to satiate your competitive urges? Weve got you covered. Whether you want to watch some high-level gameplay or jump into the action yourself, weve got Guild Wars 2 tournament [..] View

Forums

No Results

Sign In

×

Sign Up

×
Page generated in 0.6519 seconds.
Site Engine