Sci-fi

Experience the newest tactical RPG from the creators of Girls’ Frontline. Some 30 years in the future, AU agent Mendo and the mysterious girl Jefuty find themselves in gruesome battles against armed URNC forces…

Halo: Spartan Assault brings the excitement of Halo combat to Steam for the very first time. Battle your way through 30 action-packed missions against the Covenant as you explore the origin of the Spartan Ops program featured in Halo 4. *DirectX feature level 10 required. *

Observation is a sci-fi thriller uncovering what happened to Dr. Emma Fisher, and the crew of her mission, through the lens of the station’s artificial intelligence S.A.M.

Lightning Returns is the concluding chapter of the Final Fantasy XIII saga and series heroine Lightning's final battle. The grand finale of the trilogy brings a world reborn as well as free character customization and stunning action based battles.

Join dangerous raids for loot or intense PvP/PvE battles in this new realistic military shooter set in a fractured multiverse. Fight in quantum-unstable zones for control of active matter - the substance that bends time and space.

After a major bio-weapon attack on London, two scientists find themselves in a locked-down laboratory with time, and air, running out. The Complex is an interactive sci-fi thriller movie where your decisions lead to one of eight suspenseful endings.

Star Trek: Voyager - Across the Unknown is a story-driven survival strategy game in which the fate of the iconic starship is in your hands. Take the helm, manage the ship and resources, and make difficult decisions. Will you be able to bring home the ship and its crew?

Automate, optimize, and build vast factories in a post-apocalyptic automation game for those who have evolved beyond conveyor belts. Command intelligent robots that obey your plain-text commands in any language, explore the ruins of a lost civilization, and rebuild humanity one machine at a time.

A visual novel that takes place in the same universe as "7 summer days".

PREMIER EDITION - While seeking life on a distant planet, an astronaut discovers an abandoned Russian town. He suspects his mission is a hoax until a mysterious young woman saves him from a strange and deadly phenomenon...

Polarity takes it to the next level, demanding all of your wits and reflexes. Full-featured local co-op campaign.

Design and then improve the ultimate mothership. Explore a persistent living galaxy populated by 200 unique captains that can do everything you can do. Survive the zombie infection and then fight them back. Make allies and start your own faction. Build your empire. Also includes Sandbox Mode.