Impulse (command line)
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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.
The Quake II engine and later removed the impulse variable in favor of the more streamlined "give" command. Half-Life 2 continues to use impulse commands along with give commands.