Osamu Maruyama
aka: O. Maruyama
Credited on 12 games
| MLB Power Pros 2008 (2008 on PlayStation 2) | Success Mode Unit: Scenario |
| MLB Power Pros (2007 on PlayStation 2) | Success Mode Unit: Scenario |
| ESPN International Winter Sports 2002 (2002 on PlayStation 2) | Konami Computer Entertainment Osaka Inc. |
| Hybrid Heaven (1999 on Nintendo 64) | Program Team |
| Mystical Ninja Starring Goemon (1997 on Nintendo 64) | Enemy Program |
| Jikkyō Power Pro Wrestling '96: Max Voltage (1996 on SNES) | MV Support |
| Ganbare Goemon Kirakira Dōchū: Boku ga Dancer ni Natta Wake (1995 on SNES) | Programmer (プログラマー) |
| Ganbare Goemon 3: Shishi Jūrokubee no Karakuri Manji-gatame (1994 on SNES) | Programmers (ぷろぐらまーず) |
| Ganbare Goemon 2: Kiteretsu Shogun Magginesu (1993 on SNES) | Program (プログラム) |
| Tiny Toon Adventures: Buster's Hidden Treasure (1993 on Genesis) | Game Program |
| Ganbare Goemon Gaiden 2: Tenka no Zaihō (1992 on NES) | Program (プログラム) |
| Teenage Mutant Ninja Turtles: The Hyperstone Heist (1992 on Genesis) | Game Programmer |
Frequent Collaborators
- 9 games with Kazuhiko Uehara
- 6 games with Kuniaki Kinoshita
- 6 games with Hideto Inoue
- 6 games with Tomoharu Okutani
- 5 games with Tomoya Tomita
- 5 games with Shigeharu Umezaki
- 5 games with Etsunobu Ebisu
- 5 games with Nobuyuki Akena
- 5 games with Kazuhiro Namba
- 4 games with Kazue Hamagaki
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