From Sega Retro
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- Halley Wars (1991) (as ITL)
- The Majors: Pro Baseball (1992)
- World Series Baseball (1993)
- Dunk Kids (1994)
- Nomo's World Series Baseball (1995)
- Darius II (1996)
- Official website (Japanese)
- I.T.L at Game Developer Research Institute
- Research thread at SMS Power!