Altered Space: A 3-D Alien Adventure for the Game Boy offers a space exploration and adventure experience for the Japanese market. As with other regional releases, the Japanese version features the same core gameplay as other versions: exploration, puzzles, and likely some form of combat against alien threats within a 3-D rendered environment (likely a pseudo-3D effect). 

Altered Space - A 3-D Alien Adventure (Japan)

All-Star Baseball '99 (USA)