Year Title Platform(s) Notes Windows Linux Mac OS X PS2 Xbox Dreamcast 1997 Quake Mission Pack No. 1: Scourge of Armagon Yes No No No No No Expansion pack 1998 SiN Yes Yes No No No No Linux version ported by Hyperion Entertainment 2000 Heavy Metal: F.A.K.K. 2 Yes Yes Yes No No No Linux version ported by Loki Software, Mac OS Classic version ported by Contraband Entertainment, Mac OS X version ported by The Omni Group 2000 Blair Witch Volume III: The Elly Kedward Tale Yes No No No No No N/A 2003 Star Trek: Elite Force II Yes No No No No No N/A 2003 Legacy of Kain: Defiance Yes No No Yes Yes No External collaboraion with Crystal Dynamics 2004 Counter-Strike: Condition Zero Yes Yes Yes No Yes No Ritual Entertainment worked on the title in 2002 after development was transferred from Gearbox Software and before continued development was transferred to Turtle Rock Studios in mid-2003.