Development studio ArenaNet has released a new developer video for Guild Wars 2. The video was released to honor the game's 4th anniversary.

In the video the game's developers recall the company's Guild Wars 2 launch party. The MMORPG game launched 4 years ago this week on August 28th 2012 for Windows and OS X.

Guild Wars 2 claims to be unique in the genre by featuring a storyline that is responsive to player actions, something which is common in single player role-playing games but rarely seen in multiplayer ones.

The game features a dynamic event system that replaces traditional questing, utilising the ripple effect to allow players to approach quests in different ways as part of a persistent world.

Earlier this year the game went free-to-play to allow more players to experience the game before purchase. The free-to-play version of the game features several restrictions while still allowing players to experience most of the game's content.