Fallen Empire: Legions is inspired by the setting and the gameplay of Tribes 2 and other titles in the series. This is the version of the game that can be played on the social networking website Facebook. It is a singleplayer version of the game where players go through Time Trials to achieve the fastest times, while the separate version, called Fallen Empire: Legions and hosted at InstantAction.com, is multiplayer-based with modes such as Deathmatch and Capture the Flag. PlayLegions can also be played separately at InstantAction.com, away from the Facebook integration.
Armed with a rocket launcher and jetpack, players fly through gates in a 3D world to achieve the fastest times. Successful use of the terrain and well-timed boosts are key to get fluid movement. Once maximum velocity is reached, overdrive can be triggered to send the player into a hyper speed vortex. Players can compare their best times and challenge friends across six maps for the number one spot on the leaderboards. In July 2009 the game offers eight routes.