doc iconBsp extension is associated with Valve Game map file. You can open bsp files with Bsp Viewer or Bsp editor softwares.

These are the map files which developed by Valve firm. These map files are used with various games. You can open bsp files with Bsp viewer or Bsp editor software. Besides, you have chance to change files and create new maps. You can make this process with following games : 

Half-Life 2
Team Fortress
Counter-Strike: Condition-Zero

What to use bsp

BSP viewer, BSP editor, Valve 3rd party tools

which page related to bsp file

bsp Related Searches

You can check related links about bsp fileextension.