If you don't have an Xbox Live Gold subscription, participating in the beta will net you a seven-day trial period. Those who have already claimed their free seven-day trial can re-up for another seven days as part of this weekend's beta test.
Wargaming.net's World of Tanks: Xbox 360 Edition was announced back in June at E3. The free-to-play online multiplayer combat game pits players against each other in mid-20th century tanks. World of Tanks will not feature cross-platform play between Xbox 360 and PC, and players will have to register separate accounts in order to play on their platform of choice.
World of Tanks Xbox 360 Edition (E3 2013)
British tank line and new permanent rewards for participation revealed
December 13, 2013 - Wargaming, the award-winning videogame developer and publisher, today announced the open beta weekend for World of Tanks: Xbox 360 Edition. The one-time event, scheduled for December 13–15, will run globally and mark the last testing phase prior to the title's release.
The beta will be available to all gamers with Xbox Live accounts, while those without it will be able to get in on the action for a 7-day trial period. As an added bonus to non-Gold account holders who may have already expended their 7-day trial period, the trial will reset, giving gamers an additional 7 days of playing time.
Further rewards will also be available to new and returning players for a limited time during the beta. All players who log in and play at least 10 matches on Saturday, December 14th from 3–6 p. m. (Pacific Standard Time) will receive 7 days of free Premium Account status (which provides a higher accrual rate of credits and experience earned during play) once the game officially goes live. More details regarding redemption of the Premium Account status will be provided at a later date. Players will also be able to take advantage of the "Invite a Friend" functionality via the game's Platoons feature.
Lastly, the game will be further updated with the brand-new United Kingdom tank line, adding to the game some of the most iconic vehicles from that nation including the Churchill, the Black Prince and the Matilda.