Impossible Creatures

Impossible Creatures is a real-time strategy game released on December 29, 2002 developed by Relic Entertainment in conjunction with Microsoft Game Studios. Its unique feature is that the armies used are all created by the player. The armies consist of 9 creatures; each one is a combination of any two animals from a list of 76 (51 with no downloads). Many animals possess inherent abilities to add more strategic depth to the game. There is an extensive single-player campaign as well as online multiplayer functionality with different game modes, add-ons, custom maps, mods, and scenarios.

Impossible Creatures was followed up later by a free downloadable expansion entitled Insect Invasion which added new creatures and abilities to the game. The last official add on for Impossible Creatures was released in 2004. Relic has stated that they have no further plans for the Impossible Creatures universe.