Hundreds of thousands have already pre-purchased.
The response to the first Guild Wars 2 Beta Weekend Event has been overwhelming, ArenaNet president Mike O'Brien has said in a blog post.
O'Brien says that hundreds of thousands of players have already pre-purchased Guild Wars 2, enabling them to play in the beta events.
"This was a huge milestone for ArenaNet; with no NDAs and no press embargoes, the beta version of Guild Wars 2 would have to stand on its own before the full force of the Internet," he explained.
"I think it's safe to say that the response was overwhelming in more ways than one. Firstly, the number of people who pre-purchased the game far exceeded our expectations, and we had to temporarily disable pre-purchases. In the end that wasn't enough, and even with 48 worlds we didn't have enough server capacity to meet the huge demand.
"Fortunately, the vast majority of players were able to get into the game and experience Guild Wars 2 in all its glory. Seeing Tyria come alive, with players interacting with dynamic events or engaging in epic World vs. World battles, was an amazing experience."
ArenaNet is also working on increasing the server capacity for what it expects to be an even greater flood of players for the next Beta - a seven hour Stress Test will run May 14 from 11am to 6pm PDT (-7 GMT) and is open to all those who have pre-purchased.
For more information about the Stress Test, log in to the Beta Forums.