Sierra Entertainment
Company
Primary language: English
a.k.a. On-Line Systems, SierraVenture, Sierra On-Line
Official website - Wikipedia (en) - Wikipedia (ja) - Wikidata - Twitter - MobyGames - GameFAQs - VNStat
Sierra Entertainment, Inc. (formerly On-Line Systems and Sierra On-Line, Inc.) was an American video game developer and publisher. Founded in 1979 as On-Line Systems, by Ken and Roberta Williams.
Releases
| Mystery House | |||||||
| 1980-05-05 | ♥ |  | Mystery House |   | Pub & Dev | ||
| Mission Asteroid | |||||||
| 1980 | ♥ | | Mission Asteroid | | Pub & Dev | ||
| 1983 | ♥All | | Mission Asteroid |   | Pub & Dev | ||
| Wizard and the Princess | |||||||
| 1980 | ♥ | | Wizard and the Princess | | Pub & Dev | ||
| Cranston Manor | |||||||
| 1981 | ♥ | | Cranston Manor |  | Pub & Dev | ||
| 1983 | ♥ |  | Cranston Manor | | Dev | ||
| 1983 | ♥ |  | Cranston Manor | | Dev | ||
| Time Zone | |||||||
| 1982 | ♥ | | Time Zone | | Pub & Dev | ||
| Las Vegas | |||||||
| 1987-01 | ♥18+ | | Las Vegas | | Dev | ||