Slobbery

This may not be immediately apparent, especially in "safe" areas. But generally the closer to various dangerous places you go, it gets wetter/slimier.

Wet here refers to general wet sheen, not pools of water, waterfalls, rivulets, and such. Nor should instances better described as watery be included (unless it still manages to pull of exceptionally slimy impression).

Probably exists in mostly horror themed games as this is a way to make the surroundings and beings seem more alien, as there aren't really that many commonly visited natural places that are slimy and wet, and beings that are naturally slimy/wet tend to arouse fear or revulsion (slugs and such, many unknown marine animals as well).

See also:
* Juicy flesh
* Bio growth
* Splatter
* Heavy specularity (plastic-y)