On Mars: Alien Invasion is a somewhat cooperative expansion of Vital Lacerda's On Mars. Although this expansion was originally going to be called Surviving Mars, Eagle-Gryphon Games decided to change the name to On Mars: Alien Invasion to better reflect the theme and content of this expansion.

The game's story was written by Nathan Morse. The gameplay features four new and different ways to expand and play the base game. You play one against several; fully cooperative or even solo if you want depending on the chapter. Included are four new and fully replayable ways to establish colonies on Mars!