If you are looking for the best price, GG.deals often lists the game key for around $2.49 to $4.99. Creeper World: Anniversary Edition - Steam Review
: Maintains the original's high ratio of strategic depth to game complexity, requiring careful resource management and tactical unit deployment. File: Creeper.World.Anniversary.Edition.zip ...
: A unique blend of real-time strategy (RTS) and tower defense where you must take the high ground and utilize an array of weaponized towers, such as blasters and mortars, to push back the encroaching mass. Campaign and Missions If you are looking for the best price, GG
: Includes increased resolution background images to provide a crisper visual experience on modern displays. such as blasters and mortars
: Features new and "shinier" unit graphics that modernize the look of your defensive structures.