AI War 1 & 2 are both great and unique space RTS games. These games place you in the role of the last vestiges of humanity attempting to fight back against a galaxy spanning AI empire. You’re tasked with covertly taking down the rogue AI without letting them realize you’re a real threat, lest they bring the full might of their fleets down upon you.

Creeper World is a series of tower defense games with a unique twist: the enemy is a liquid! You’ll have to use a variety of weapons and tools to fight back against the literal tide of creeper. The third game is my personal favourite, though they’re all awesome.

Mosa Lina is self described as “a hostile interpretation of the immersive sim”. This game is chaos incarnate. Every level you are given a random set of tools and must touch or destroy all fruit and make it to the goal. Some levels will not be possible. Failure is expected. You can do some prettt cool things with a spear and a phaser though.