Open source (188)

Giddy 3: The Retro Eggsperience

Platform, 2000
Freeware, Freeware

Gladiator

Role-Playing, 1995
Shareware, Source code

Glizda

Arcade, 1998
Full version, Source code

God of Thunder

Also known as GOT

Adventure, 1993
Full version, Source code

The Great Giant Sisters

Platform, 1998
Freeware, Source code, Editor

Harmony

First-Person Shooter, 2009
Freeware (installed), Freeware, Extra

Heretic

First-Person Shooter, 1994
Shareware (installed), Shareware

Heroes

Arcade, 1998
Freeware (installed), Freeware, Update

Hexen II

Role-Playing, 1997
Playable demo (installed), System component, Playable demo

Hexen: Beyond Heretic

Also known as Heretic 2

Adventure, 1995
Playable demo, Preview, FAQ

The Horizont NibbleS

Also known as The NibbleS

Arcade, 1999
Freeware, Source code

Hunchback (FireBall Software)

Platform, 1988
Full version (installed), Full version

Hypercycles

Racing, 1995
Shareware (installed), Shareware

In Pursuit of GREED

First-Person Shooter, 1996
Playable demo (installed), Full version, Source code

Inherit the Earth: Quest for the Orb

Adventure, 1994
Non-playable demo, Playable demo

Invaders 1978

Shooter, 1996
Freeware, Freeware, Source code