Giga (戯画) was a Japanese adult game and visual novel brand used by TGL subsidiary Entergram. The Giga brand was used on both regular visual novels as well as games that feature mecha with action-oriented gameplay elements. One of its sub-brands, Baldrhead, has been used for several of these action-oriented visual novels. Aside from their visual novels, they were known for creating the Variable Geo fighting game series for PC9800, which was later ported to TurboGrafx-CD, PC, Super Famicom, Sega Saturn and PlayStation.
Some of Giga's games have had consumer port releases onto consoles with the sexual content removed. For example, Kono Aozora ni Yakusoku o was ported to the PlayStation 2 in 2007[1][2] and the PlayStation Portable