Gaia Project is based on Terra Mystica. Those who have played Terra Mystica will recognise the game play and pick this game up relatively easily. This however is in space!
As in the original Terra Mystica, fourteen different factions live on seven different kinds of planets, and each faction is bound to their own home planets, so to develop and grow, they must terraform neighboring planets into their home environments in competition with the other groups.
In addition, Gaia planets can be used by all factions for colonization, and Transdimensional planets can be changed into Gaia planets.