We hope you've got space for Lara Croft and one guardian of light on your couch, because that's where the heroic pair will find themselves on August 18th. Developer Crystal Dynamics has confirmed that when Lara Croft and the Guardian of Light launches on Xbox Live Arcade, concluding Microsoft's Summer of Arcade promotion, it will only support offline co-op.

Online co-op, as well as Xbox Live standards like full leaderboard support and voice chat functionality, will be introduced via a free update on September 28. On the same day, Lara Croft and the Guardian of Light will be launched on PlayStation Network and Steam.

The baffling omission of the online component appears to have been made at the last minute, with Crystal Dynamics general manager Darrell Gallagher telling Joystiq, "We made a decision recently because we were focusing on how we can deliver the best possible experience to the players. If we had launched with online co-op, we wouldn't feel comfortable that it was the best possible experience for the player." Though online co-op had been promoted and promised since the game's announcement, Gallagher claims that "nothing underhanded" influenced the decision. "This is our first digital title and we want to make sure we deliver the best possible experience to players."