Apps with 'Terraforming' feature

Dwarf Fortress is a single-player fantasy simulator. You can control a dwarven outpost or an adventurer in a randomly generated, persistent world.

Spore is a multi-genre single-player god game developed by Maxis and designed by Will Wright.

Engage in space exploration and terraform new worlds in this fun and exciting planet building simulator rooted in real science. TerraGenesis dynamically animates entire planets with changing biospheres, all based on real data from NASA.