All-Star Baseball 99 is a video game developed by Iguana Entertainment and Realtime Associates Seattle Division and published by Acclaim Entertainment for the Game Boy and the Nintendo 64 in 1998.

The game's cover features Colorado Rockies outfielder Larry Walker.

The game contains exhibition, playoff, home run derby, and season modes.

[4][5] Next Generation called the former the best baseball game for Nintendo 64 despite noting minor AI problems and a slower pace.

[18] GamePro said that the same console version "is this season's sports phenom, delivering stylish looks and clutch, long-ball gameplay.