Open source (174)

'Ghini Run

Racing, 2002
Freeware, Source code

Absence

First-Person Shooter, 2008
Freeware, Freeware, Source code

Abuse

Platform, 1995
Shareware (installed), Full version, Source code, FAQ, Extra

Adventure Game Studio

Also known as AGS

Adventure, 1997
Freeware (installed), Freeware

Alex the Allegator

Also known as Alex the Allegator 1

Platform, 1999
Freeware (installed), Freeware, Source code

Alex the Allegator 2

Puzzle, 2001
Freeware, Source code

Alien Assault II

Shooter, 1997
Freeware (installed), Freeware, Source code

AllegroHack

Role-Playing, 2000
Freeware, System component

Amulets & Armor

Also known as Amulets and Armor

Role-Playing, 1997
Shareware (installed), Shareware, Playable demo

Anacreon: Reconstruction 4021

Turn-Based Strategy, 1987
Freeware (installed), Freeware, Extra, Source code, Freeware

Anzu Castle Gracula

Platform, 2024
Shareware, Source code

ArkanDOS

Arcade, 2014
Playable demo

Around the World - X-Mas

Platform, 1999
Freeware (installed), Freeware

Arrakis

Real-Time Strategy, 2000
Freeware, Source code, Editor

Avalon

Role-Playing, 1998
Freeware, Source code, Extra

Barren Planet

Turn-Based Strategy, 2023
Freeware, FAQ, Game expansion