The listing, *2000 GIN* Commandos Collection (Steam) has ended.
Winner gets 4 codes!
Commandos: Behind Enemy Lines
http://store.steampowered.com/app/6800/
Commandos 2: Men of Courage
http://store.steampowered.com/app/6830/
Commandos 3: Destination Berlin
http://store.steampowered.com/app/6840/
Commandos: Beyond the Call of Duty
http://store.steampowered.com/app/6810/