Thanks, I edited my first post, don't know why I didn't think of that before. And, Tatsujin & Truxton are the same, I played them both just to make sure.
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yes, Tatsujin & Truxton are the same games, but
Tatsujin Oh = Tatsujin 2 = Truxton 2 (
http://gh.ffshrine.org/soundtracks/1198) is the second episode of the game
Tatsujin (Truxton) [arcade, megadrive, pc-engine]
pc-engine
http://youtube.com/watch?v=pTM6Mdiz6Ts&feature=related
Tatsujin Oh (Truxton 2) [arcade, fm-towns]
arcade
http://youtube.com/watch?v=fedh5nMQjD0