text: Frictional Games released Linux versions of both Penumbra: Black Plague and Penumbra: Overture, as well as the expansion pack Penumbra: Requiem. They also released Amnesia: The Dark Descent for Linux simultaneously with the Windows and Mac OS X versions, a practice they continued through to Amnesia: Rebirth (2020). S2 Games released Linux clients for their titles Savage: The Battle for Newerth, Savage 2: A Tortured Soul and Heroes of Newerth. Wolfire Games released a Linux version of their game Lugaru  and supported its sequel Overgrowth on Linux; David Rosen's  earlier Black Shades was also ported to Linux via released source code. Arctic Paint released a Linux version of Number Drill. Charlie's Games has released a Linux version of Bullet Candy Perfect, Irukandji, Space Phallus and Scoregasm. Spiderweb Software has released Exile III: Ruined World, Blades of Exile, and Avadon: The Black Fortress for Linux.
  Illwinter Game Design released Conquest of Elysium II, Dominions: Priests, Prophets and Pretenders, Dominions II: The Ascension Wars, and Dominions 3: The Awakening for Linux. Introversion Software released Darwinia, Uplink, and DEFCON. Cartesian Theatre is a Vancouver, British Columbia, Canada, based software house specializing in free, commercial, games for Linux, most notably Avaneya. Kot-in-Action Creative Artel released their Steel Storm games for Linux. Hazardous Software have released their game Achron for Linux. Harebrained Schemes has released Shadowrun Returns, Shadowrun: Dragonfall, Shadowrun: Hong Kong, and BattleTech.