by Logical Design Works, Inc., 1991
by Digital Dreams Multimedia, 1994
by Sphere, Inc., 1990
by Particle Systems Ltd., 1993
by Fireglow Games, 2000
by Digital Image Design Ltd., 1995
by Milestone s.r.l., 1999
by Sierra On-Line, Inc., 2000
by Bullfrog Productions, Ltd., 1993
by Looking Glass Technologies, Inc., 1994
by Looking Glass Studios, Inc., 1999
by Simis Limited, 1998
by Distinctive Software, Inc., 1987
by Accolade, Inc., 1990
by Elite Systems Ltd., 1997
by Trilobyte, Inc., 1995
by Trilobyte, Inc., 1993
by Deadly Games, 1998
by Sierra On-Line, Inc., 1995
by LucasArts Entertainment Company LLC, 1997
by Distinctive Software, Inc., 1989
by Bethesda Softworks LLC, 1994
by Bethesda Softworks LLC, 1996
by Empire Interactive Entertainment, 1998
by Dynamix, Inc., 1993
