Best PC Free Science Fiction Games

Explore, fight, and build your empire in a massive sci‑fi sandbox.

An innovative hybrid of first-person shooter and real-time strategy gameplay set in a fantasy sci-fi world.

A tactical MOBA developed by Trion Worlds that combined RTS gameplay with massive multiplayer battles.

A free-to-play sci-fi MMORPG featuring heavily-sexualized female characters.

Team up with Cartoon Network heroes in a free‑to‑play sci‑fi MMO shooter.

Engage in futuristic free-to-play tactical first-person combat.

A sci‑fi interactive fiction adventure where every decision shapes a desperate survival story

Delve deep, retrieve the Amulet of Yendor, and die gloriously.

A dark cyber‑punk point‑and‑click adventure where a bartender must kill seven evils.

A fast-paced, hardcore team-based first-person shooter set in a post-apocalyptic London.

A free-to-play sci‑fi fantasy MMO where you hunt, craft, and explore together.

A free, horror‑filled expansion that deepens Doom 3’s dark sci‑fi nightmare

Command mech armies in a gritty sci‑fi turn‑based strategy

Classic retro scrolling shooter with deep ship customization

Fast‑paced arena shooter that defines online competition

A tweet‑driven sci‑fi text adventure crafted by Emily Short

Save Bazoik from the Flemoids with a cereal‑armored hero and a teleport‑zapping zorcher.

A far‑future text adventure where your typed commands shape the cosmos.

A midnight mystery unfolds at Century Park on New Year's Eve 1999.

Classless sci‑fantasy MMO with open world crafting and dynamic events.

Explore, evolve, and dominate an ever‑changing sandbox universe.

Explore the entire universe in real-time 3D

Co‑op sci‑fi shooter where squads hunt alien infestations

Defend your city from a relentless, spreading fluid enemy.