Relic has stated that they have no further plans for the Impossible Creatures universe. The last official add on for Impossible Creatures was released in 2004.
Impossible Creatures was followed up later by a free downloadable expansion entitled Insect Invasion which added new creatures and abilities 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. Many animals possess inherent abilities to add more strategic depth to the game.
The armies consist of 9 creatures each one is a combination of any two animals from a list of 76 (51 with no downloads), resulting in 127,392 possible combinations with all official mods downloaded. Its unique feature is that the armies used are all created by the player. Impossible Creatures is a real-time strategy game released on Decemdeveloped by Relic Entertainment in conjunction with Microsoft Game Studios.
