PlanetCon

Master of Orion 2 also known as MOO2 is considered the classic 4x turn based strategy game set in space. The game has a kind of cult status and even by to days standards is still only matched in game play by very few of its competitors.

Fleet Wars is a persistent turn based strategy game where the goal is dominate other empires in order to be the first to construct the Orion project.

The Final Conflict is an old military strategy game.

Robot Warlords is a Sci-fi turn based strategy game that was released on the PS2 back on December 14th 2001. It didn't get very good reviews, or sales and, hence, is very very rare.

Turn-based strategy game set in space.

Last Origin is a strategy RPG mobile game with hero collecting mechanics standard to most games of its kind. The player takes the role of a newbie commander who is, as far as we know, the last remaining human being in a post-apocalyptic world ravaged by alien parasites known as Iron Worms.

30 years on, the battle for our world's future continues. Super Robot Wars is a tactical RPG that brings characters and robots from a variety of mecha anime together to battle their mutual foes.

Planet M.U.L.E. is an unofficial, cross-platform, online adaptation of the classic multiplayer game M.U.L.E. The game is a combination of real-time and turn-based strategy elements where up to 4 players compete for land and resources.

Space based strategy game in which you control several functions of your ship like shields, wepaons etc. in order to win battles.