Windows

Globulation 2

macOS, Windows, Linux

Liquid War

macOS, Disk Operating System, Windows, and 1 more

GNU Project

XPilot

macOS, Windows

FreedroidRPG

Linux, Windows, macOS

Widelands

macOS, Linux, Windows

Frets on Fire

macOS, Mac OS, Windows, and 1 more

Unreal Voodoo

openBVE

macOS, Windows, Linux

Christopher Lees

X-Moto

macOS, Windows, Linux

TuxType

macOS, Windows

Tux, of Math Command

Linux, macOS, Windows

Bill Kendrick

Egoboo

macOS, Windows, Linux

PlaneShift

macOS, Mac OS, Windows, and 1 more

Ryzom

iOS, macOS, Linux, and 2 more

Pingus

macOS, Windows, Linux

Ingo Ruhnke

Crossfire

Linux, macOS, Mac OS, and 1 more

Scorched 3D

macOS, Windows, Linux

SimCity

web browser, Wii, Windows, and 11 more

Nintendo Entertainment Analysis & Development, Maxis

MegaMek

macOS, Windows, Linux

Lugaru

macOS, Windows, Linux

Wolfire Games

Freedoom

macOS, Disk Operating System, Windows, and 2 more

Mari0

Android, macOS, Windows, and 1 more

ChessV

Windows

C-evo

Windows

Blob Wars: Metal Blob Solid

macOS, Windows, Linux

Chromium B.S.U.

iOS, macOS, PlayStation Portable, and 2 more

Unknown Horizons

macOS, Linux, Windows

Frozen Bubble

macOS, Windows, Linux, and 2 more

Armagetron Advanced

macOS, Windows, Linux

Enigma

macOS, Mac OS, Windows, and 1 more

Neverball

Android, Windows, Linux