Best PC Free Science Fiction Games

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

Solve puzzles alongside the Doctor in a time‑travel adventure

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.

Twenty new horror‑filled levels expand Doom II’s classic mayhem

A sci‑fi platform shooter where choices shape the story

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.

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

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

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

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

Classic retro scrolling shooter with deep ship customization

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.

Fast, physics‑driven multiplayer deathmatch in the Half‑Life 2 universe

Fast‑paced arena shooter that defines online competition

Political intrigue in a medieval sci‑fi palace