Sins Of A Solar Empire - Sins of a Solar Empire is an Adventure, Strategy, Real-time-strategy, Science-fiction, Exploration, Aliens, Single and Multiplayer Space Simulation developed by Ironclad Games and published by Stardock.
Nuclear Throne - Post-apocalyptic roguelike-like top-down shooter about mutants.
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.
Enter the Gungeon - Enter the Gungeon is a gunfight dungeon crawler following a band of misfits seeking to shoot, loot, dodge roll and table-flip their way to personal absolution by reaching the legendary Gungeon’s ultimate treasure: the gun that can kill the past.
FreeOrion - FreeOrion is a turn-based space empire and galactic conquest (4X) computer game being designed and...
EVE Online - Player-created empires, player-driven markets, and endless ways to embark on your personal sci-fi adventure.