Free games by keyword: single player
Play games defined by keyword: "single player".

Path of Exile
RPG
Windows, Xbox One, PlayStation 4Grinding Gear Games

Dwarf Fortress
simulation / roguelike
Windows, Linux, Mac OSXBay 12 Games

Brogue
RPG / roguelike
Windows, Linux, Mac OSXBrian Walker

OpenTTD
simulation / management
Windows, Linux, Mac OSX, Free BSD, SolarisOpenTTD Team

Hyper Princess Pitch
shooter / shoot 'em up
WindowsDaniel Remar

Cataclysm: Dark Days Ahead
RPG / roguelike
Windows, Linux, Mac OSXKevin Granade

Magic: The Gathering Arena
strategy / collectible card game
WindowsWizards of the Coast

Battle for Wesnoth
strategy / turn-based tactics
Windows, Solaris, Linux, Free BSD, BeOS, Amiga, Mac OSX, iOS, AndroidDavid White

Knytt Stories
action-adventure / metroidvania
WindowsNicklas Nygren

Digital: A Love Story
adventure / visual novel
Windows, Linux, Mac OSXChristine Love

The Ur-Quan Masters
strategy / space exploration
Windows, Linux, Mac OSX, Amiga, Android, iOSToys For Bob

Dungeon Crawl Stone Soup
RPG / roguelike
Windows, Mac OSX, LinuxDCSS Devteam

Angband
RPG / roguelike
Windows, Mac OSX, Linux, DOS, AndroidAngband Development Team

Unknown Horizons
simulation / city building
Windows, Linux, Mac OSXThe Unknown Horizons Developers

Ascii Sector
simulation / space exploration
Windows, Linux, Mac OSXLaserbrain Studios

Beneath a Steel Sky
adventure / point & click
DOS, Amiga, Windows, UNIXRevolution Software

L'Abbaye des Morts
platform
Windows, Linux, Mac OSX, Spectrum ZXLocomalito

Legend of Princess
platform / run and gun
WindowsKonjak

Knytt
action-adventure / metroidvania
WindowsNicklas Nygren

0 A.D.
strategy / real-time strategy
Windows, Mac OSX, LinuxWildfire Games