A term used in video games to describe the outside of the main game area or map. It can be accessed either accidentally, or through the use of a no clip cheat/code. Blue Hell can often contain objects hidden from the map/area by the map designer, for example, in Counter-Strike or GTA3.

Term made famous by The Rock "Dwayne Johnson".

Falling through the map in GTA3 and you are surrounded by the BLUE HELL

The Microsoft Windows Operating System (any version).

The vast majority of the Default Interface is in some shade of blue, and as any windows user knows, it's pure PC Hell.

A Term used to describe the blue portion below a Command and Conquer Renegade map. Generally used when you spawn belowground for some reason.