A bsp file extension is related to the map format used by Valve Source video gaming engine like Half-Life 2, Counter Strike, Portal, Team Fortress etc.

There are 4 other file types using
the BSP file extension!

bsp icon.bsp - Quake 2 map

empty icon.bsp - Bioshock saved game file

empty icon.bsp - BestAddress HTML Editor project

empty icon.bsp - PBASIC preprocessor input file

BSP file extension - Source engine 3D first person action game map

What is bsp file? How to open bsp files?

File type specification:

Game file type icon Game file type

bsp file icon: bsp filetype icon

Half-Life, Team Fortress, Counter Strike - 3D first person action game map file.

The format is similar but not identical to the BSP file formats of the Half-Life 1 engine, which is based on the Quake 1 and Quake 2 file formats, plus that of the later Quake 3.

The bsp file contains the vast majority of the information needed by the Source engine to render and play a map. This includes the geometry of all the polygons in the level, references to the names and orientation of the textures to be drawn on those polygons, the data used to simulate the physical behaviour of the player and other items during the game.

The location and properties of all brush-based, model (prop) based, and non-visible (logical) entities in the map, and the BSP tree and visibility table used to locate the player location in the map geometry and to render the visible map as efficiently as possible. Optionally, the map file can also contain any custom textures and models used on the level, embedded inside the map's Pakfile lump.

The default software associated to open bsp file:

Valve Hammer Editor icon

Valve Corporation logoValve Hammer Editor  Microsoft Windows software

Company or developer:
Valve Corporation

Valve Hammer Editor is Valve Software's map creation program for their game engine - Source engine.

The current version supports both Source and GoldSrc, and can only be accessed via a free download of the Source engine SDK.

Source SDK icon

Valve Corporation logoSource SDK  Microsoft Windows software

Company or developer:
Valve Corporation

Source SDK is free development environment used to create mods and content for the Source 2006, Source 2007 and Source 2009 engine branches and related video games, like Half-Life 2, Dota 2, Team Fortress 2, Left 4 Dead, Portal, etc.

Half-Life 2 icon

Valve Corporation logoHalf-Life 2  Microsoft Windows software

Company or developer:
Valve Corporation

Half-Life 2 is successor of legendary 3D first person shooter computer game Half-Life. Player takes role of scientist Gordon Freeman that have traveled to City 17 in the Eastern Europe. Freeman is forced to fight against increasingly unfavorable odds in order to survive. In his struggle, he is joined by various allies, including former Black Mesa colleagues, oppressed citizens of City 17, and the Vortigaunts. The game uses the Source game engine, which includes a heavily modified version of the Havok physics engine.

Half-Life: Counter Strike icon

Valve Corporation logoHalf-Life: Counter Strike  Microsoft Windows software

Company or developer:
Valve Corporation

Half-Life: Counter Strike is team multi-player first person shooter computer game. Counter-Strike brings a certain level of realism into the arena of multiplayer first-person shooters, stresses the importance of team unity and punishes anyone who tries to hog all the glory.

Team Fortress 2 icon

Valve Corporation logoTeam Fortress 2  Microsoft Windows software

Company or developer:
Valve Corporation

Team Fortress 2 is a team-based first-person shooter multiplayer video game developed by Valve Corporation. It is a sequel to the original mod Team Fortress and its GoldSrc engine remake.

Portal icon

Valve Corporation logoPortal  Microsoft Windows software

Company or developer:
Valve Corporation

Portal is 3D first person puzzle solve computer game developed by Valve.Player must solve puzzles in the Aperture Science Enrichment Center to win the game.

Help how to open:

Use Valve Hammer editor to open *.bsp files.

How to convert:

Probably cannot be converted to other formats.

List of software applications associated to the .bsp file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open bsp file, edit bsp file, convert bsp file, view bsp file, play bsp file etc. (if exist software for corresponding action in File-Extensions.org's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting bsp files.

Software that open bsp file - Source engine 3D first person action game map

Programs supporting the exension bsp on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open bsp file action.

Microsoft Windows:

Main software associated with bsp file by default:
Valve Hammer Editor small icon Valve Hammer Editor
Source SDK small icon Source SDK
Other suggested software:

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