Endless Space - Endless Space is an Amazing, Strategy, Science-fiction, Turn-based, Space, Futuristic, Exploration, Co-op, Single and Multiplayer Space Simulation created and published by Amplitude Studios.
EVE Online - Player-created empires, player-driven markets, and endless ways to embark on your personal sci-fi adventure.
Stellaris - Stellaris is an Adventure-based, RTS (Real-time Strategy) Space, Sandbox, Sci-Fi, Single and Multiplayer video game created and published by Paradox Interactive.
FreeOrion - FreeOrion is a turn-based space empire and galactic conquest (4X) computer game being designed and...
Star Ruler - Star Ruler is an Action-Adventure, Science-fiction, Real-time Strategy, Space, Strategy, Single and Multiplayer video game developed by Blind Mind Studios and published by IGS.
Planet Capture - Browser-based, sci-fi space RTS game.