Bases Loaded (Japanese: Moero!! Pro Yakyuu) is a baseball simulation game for the NES (Famicom), released in Japan by Jaleco in 1987. Known for its realistic graphics and unique perspective, it was one of the most popular baseball games of its era and spawned multiple sequels.
The game uses a tilted camera angle and offers three distinct stadiums to choose from. During matches, all 11 Central League team stadiums appear in the background, boosting the game’s sense of realism.
It introduces a biorhythm system with three stats: Physical (P), Sensitivity (S), and Intelligence (I). These stats affect player performance—positive values mean good form, negative values mean poor form, and zero means a critical state. Players must adjust tactics based on these stats to get the best out of their team.
Bases Loaded was a huge hit in Japan, ranking among Jaleco’s best-selling games. Follow-up titles launched on various platforms, keeping the series’ influence alive.