Penny Arcade Expo
The Penny Arcade Expo (PAX) is an annual gaming show that is held in or around Seattle, Washington, each summer. The show is hosted by the creators of the popular online comic, Penny Arcade. ArenaNet has attended PAX for many years. Starting with a small booth in 2004, before the launch of the first Guild Wars campaign, the studio has taken part nearly every year since, and is now esteemed as one of the keystones of the show.
ArenaNet hosted the premiere giveaway of The Art of Guild Wars 2, with artists from the team signing copies of the book, and announced that it would come to sale in the near future. There were also talks about the upcoming first Guild Wars novel, at the time still titled Fall of Ascalon.
The event was held between September 3rd and September 5th. ArenaNet offered the first playable demo of Guild Wars 2, which had premiered a few weeks before at Gamescom, and organized other activities, such as a Dynamic Events Pannel (in which participants designed an event for the game), demo presentations, and the usual late night party. Many of the staff members were available at the NCSoft booth to chat with players.
26-28 August 2011: There's no way ArenaNet would miss PAX Prime, a legendary three-day gaming festival in Seattle, Washington, North America. They've got big plans and surprises for this year's PAX, so stay tuned!
With the imminent Guild Wars 2 release, ArenaNet decided to miss out at PAX, but organized a launch party in their headquarters instead.
2013: Anniversary Bash
In celebration of the one year anniversary of the Guild Wars 2 launch, ArenaNet organized an event, the Anniversary Bash, during PAX 2013. Fans could attend to celebrate the anniversary with the developers, or to play the Super Adventure Box: Back to School release for the first time. ArenaNet also announced the Tequatl Rising release, showing off the revamped Tequatl the Sunless and the new LFG tool. Later, there was a developer panel and the finals of the Guild Wars 2 Invitational tournament. Players attending the event received a code for Mini Mr. Sparkles, a Guild Wars 2 backpack bag, and bandana.
On August 29th, 2014, ArenaNet and MMORPG.com partnered together to hold a Meet and Greet. They held merchandise raffles, gave away free Scarlet t-shirts, and provided food and drinks. They participated in a "Future of Online Gaming" Panel, where former Game Director Colin Johanson and other MMORPG industry veterans discussed where online games were headed and answered questions from fans. 
ArenaNet provided a look at the upcoming purchaseable expansion pack Heart of Thorns with the Guild Wars 2: Beyond the Point of No Return presentation at PAX South. The event took place January 24, 2015. The panelists were Mike O'Brien and Colin Johanson. Players who logged in during this time period (January 24th/25th) were given the Experience Bonus effect, which doubled experience gain.