With Sierra's Tribes 2 going offline last year, online service TribesNext has revitalized the multiplayer shooter by recreating the game's net code. The service is free and is currently undergoing its open beta stage.
Tribes 2 was originally released in 2001 and was made free in 2004; however, after it went free, Sierra stopped distributing CD keys for the game. TribesNext alleviates this problem by doing away with CD keys.