MAME 2003-Plus (Page 105)
.png)
Ojousan Japan 871204
 (unprotected).png)
Oriental Legend Special - Xi You Shi E Zhuan Super ver. 103 China Tencent unprotected
Oli-Boo-Chu
Omega
Omega Fighter
Omega Fighter Special
Omega Race
One Shot One Kill
.png)
2 On 2 Open Ice Challenge rev 1.21
.png)
Operation Wolf US
.png)
Operation Wolf 3 World
.png)
Operation Wolf 3 US
Operation Bear
.png)
Orange Club - Maruhi Kagai Jugyou Japan 880213
Orbit
Orbitron
.png)
Ordyne Japan
.png)
Oriental Legend - Xi Yo Gi Shi Re Zuang ver. 126
.png)
Oriental Legend - Xi Yo Gi Shi Re Zuang ver. 112 Chinese Board
.png)
Oriental Legend - Xi Yo Gi Shi Re Zuang ver. 112
.png)
Outrunners US
.png)
Psycho-Nics Oscar US
.png)
Psycho-Nics Oscar Japan revision 2
.png)