Following Microsoft's promise of a free Xbox Live game as a 'thank you' for users' loyalty, the firm has confirmed that the title will be become available this Wednesday.

Aquatic shooter Undertow, which normally sells for 800 Microsoft points, will be made available free of charge to all members worldwide.

However, Microsoft has yet to confirm whether it intends to refund points to Xbox Live members who have already purchased the game.

During the Christmas period, Xbox Live users complained of not being able to access the service, but Microsoft, which claims the problems were caused by an increase in the number of gamers joining Xbox Live, decided not to compensate users, but to 'thank' them by issuing a free game.