The Warehouse Basement (also known as the Lava Bridge) is a stage featured in the original Killer Instinct. It serves as one of Eyedol's stages and, as such, serves as the final stage of the original game's arcade mode.
The stage itself is not so much a basement as it is an underground lair with a bridge suspended over molten lava (in which the player can uppercut Eyedol into). In the background, there are various types of mechanical equipment as well as bats flying in the rafters above.
- Despite the fact that players can choose to uppercut Eyedol into the lava pool during the game's arcade mode, this stage does not have a Knockoff/Stage Ultra for regular play.
- In the SNES version, this stage appears as the background for Fulgore's ending where it is being mass-produced.