Adventure Island II on the Game Boy is actually a port of Adventure Island III on the NES/Famicom. The Game Boy Adventure Island numbering scheme ignores the first game in the series and this 1993 handheld conversion is the rather excellent part three for the NES/Famicom, but re-titled as part two for the OG Game Boy. Because it’s always fun to confuse people with mismatched titles in a series…

The Game Boy version of Adventure Island III features a password system for saving and resuming games, as well as an interactive map that allows the player to re-visit previously completed stages to unlock new paths (similar in some ways to the map in Super Mario World).

This is another decent port and fun platform game on the Game Boy. The downsides to playing this version over the NES/Famicom version of Adventure Island III are: a reduced-size playing window, and a lack of colour. But they don’t really hurt the game’s playability, which is good overall. The upsides are: the aforementioned password system and map, which are not in the NES/Famicom version.

More: Adventure Island 3 on Wikipedia