The field of the invention relates to multi-user online gaming systems, and more particularly to systems and methods that enable customizable teams for online active games. In an embodiment, the system includes an online game session server system communicatively coupled to a network for access by a plurality of users to establish a plurality of real-time interactive games sessions, wherein each game session includes at least one team and wherein the at least one team may be established in accordance with a preferred composition defined by a user.