Cyber Troopers Virtual-On Oratorio Tangram is a 1998 arcade action game from Sega, a 3D fighting game where the player assumes control of a giant humanoid robot. It was developed initially on the Sega Model 3 arcade hardware. Updated versions (Ver.5.4/5.45) were ported to the Dreamcast home console in 1999 and to North American arcades in 2000. A third update (Ver.5.66) was developed on the NAOMI board in 2000 and was ported to the Xbox 360 in 2009. Oratorio Tangram is part of the Virtual On series and is the sequel to Virtual On: Cyber Troopers (1995); it was followed by the Japan-exclusive Cyber Troopers Virtual-On Force (2001).