This tool uses the binary space partitioning method to create dynamic playable and fully customizable levels. Using the tools of the engine the player can create anything that they want, and place objects anywhere they would like. The tool works by designing blocks and allows for a recreation of anything a player can think of. This tool is useful for creating custom maps and game modes and is essential for any big Counter-Strike, Left 4 Dead 2, or Half-Life player. Valve Hammer Editor, known previously as Worldcraft, is a map editor designed by Valve.
