Bug! is a platform video game developed by Realtime Associates and published by Sega originally for its console, the Sega Saturn. It was first released in North America, in 1995, just weeks after the Saturn's launch there; in Europe on September 15, 1995; and, in Japan, on December 8 the same year. It was also ported to Windows 3.1x and Windows 95 in 1996 by Beam Software. Notably, the game is one of the earliest examples of 3D platforming, as well as one of the first platform games released on the Saturn. However, its style of 3D platforming is restricted to a track, unlike many in the genre that allow for unrestricted movement in all directions.