Water Levels. (e.g. Water Temple in Zelda OoT)
Swamp Levels. (in Onimusha, the last one I think, the only one I played)
Sewer Levels. (often paired with water levels.)
Swamp-Sewer Levels (Diablo II)
Underwater sewer levels under a swamp (don't get me started)
There are so many of them in so many great games, but only so few get them right.
__________________
>:(
C-:
|