BSP
From Just Solve the File Format Problem
BSP is a game map format used in the Quake series and some other computer games, using binary space partitioning to define the edges of objects.
Format descriptions
- Quake 1/id Tech 1 BSP file format
- Quake 2/id Tech 2 BSP file format
- Quake 3/id Tech 3 BSP file format
- Source Engine BSP file format
- Unofficial BSP v30 file spec