Operation Wolf 3 (US)

Out Run (sitdown/upright, Rev B) (Enhanced Edition v1.1.0)

Operation Thunderbolt (US)

Out Run (deluxe sitdown) (Enhanced Edition v1.0.3)

Out Zone (oldest set)

Oedo Fight (Japan Bloodshed Ver.)

Out Zone (set 5)

Ordyne (Japan)

Operation Wolf (World, set 2)

Operation Thunderbolt (Japan)

Offensive (Spanish bootleg of Scramble) [Bootleg]

Oriental Legend – Xi Yo Gi Shi Re Zuang (V111, Taiwan)

Out Zone (harder)

Out Zone (older set)

Orius (ver UAA)

Out Zone (set 2)

Ozon I

Operation Wolf (Japan)

Oishii Puzzle Ha Irimasenka

Operation Thunderbolt (US, older)

Oriental Legend Special – Xi Yo Gi Shi Re Zuang Super (V103, China, Tencent) (unprotected)

Operation Bear [Bootleg]

Oriental Legend – Xi Yo Gi Shi Re Zuang (V111, Korea)

Omega Fighter Special