was a Japanese video game manufacturer in operation from at least 1986 to 2000. Notable releases were primarily for the Pioneer LaserActive

Pioneer LaserActive

The Pioneer LaserActive was a short-lived Laserdisc-based game console released by Pioneer in 1993. In addition to LaserActive games, separately sold add-on modules expanded the hardware to include compatibility with the Sega Mega Drive/Sega Genesis and PC Engine/TurboGrafx 16 game cartridges and...

 and Dreamcast, though other platforms included the MSX

MSX

MSX was the name of a standardized home computer architecture in the 1980s conceived by Kazuhiko Nishi, then Vice-president at Microsoft Japan and Director at ASCII Corporation...

, Sega Game Gear

Sega Game Gear

The was Sega's first handheld game console. It was the third commercially available color handheld console, after the Atari Lynx and the TurboExpress....

, and PC-FX

PC-FX

The is a video game console released in Japan on December 23, 1994 by NEC Corporation. It is the 32-bit successor to NEC's PC Engine ....

. The company was initially known for the J.B. Harold Murder Club

J.B. Harold Murder Club

J.B. Harold Murder Club, known as J.B. Harold no Jikenbo #1: Murder Club in Japan, is a 1986 murder mystery adventure game, developed by Riverhillsoft and released for the NEC PC-98, MSX, MS-DOS, NEC TurboGrafx-CD and Nintendo DS platforms...

series of murder mystery adventure game

Adventure game

An adventure game is a video game in which the player assumes the role of protagonist in an interactive story driven by exploration and puzzle-solving instead of physical challenge. The genre's focus on story allows it to draw heavily from other narrative-based media such as literature and film,...

s, developed from 1986 onwards, and were later known for several early survival horror games such as Doctor Hauzer in 1994 and the Overblood

Overblood

Overblood is a science fiction video game developed by Riverhillsoft and published by Electronic Arts for the PlayStation. It is considered one of the first survival horror games to make use of a fully three-dimensional virtual environment, second only to Riverhillsoft's own Doctor Hauzer, a fully...

series of survival horror adventure games set in a science fiction universe.