Impulse (command line)

Impulse is an in-game console command that is present in the first-generation Quake engine and games based on it (such as "Half-Life"). Impulse, followed by an integer from 0 to 255, enables special modes or changes the current weapon.

In "Quake" it does the following:
* 1-8: Select weapon 1-8
* 9: Give the player all weapons and keys (Cheat)
* 10: Selects next weapon
* 11: Gives the player a Rune (Cheat)
* 12: Selects previous weapon
* 255: Gives the player "Quad Damage" (Cheat)

Mod programmers can add extra impulse commands.

id Tech 2 and later removed the impulse variable in favor of the more streamlined "give" command, although configuration files may internally use impulse, such as key binding in "Doom 3". "Half-Life 2" continues to use impulse commands along with give commands.