The beta testing for the Xbox 360 build of Call of Duty 4: Modern Warfare (PS3 and PC) is coming along nicely. However, some of the fans, especially those residing in Europe, might be wondering as to how they can join the beta testing that will be conducted in their markets on September 7.

There are many ways to join actually and one such easy way is pre-ordering the copy of the game from GAME retail chain. According to their website, once you pre-order the game, the store will send you an email containing the code and instructions on how to use it.

Take note that every pre-order will earn you a unique code. Game.co.uk mentioned that this deal has been made possible because they are the exclusive retail partner of Activision for Call of Duty 4: Modern Warfare in UK and Ireland.