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.

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.