Cheat Action
/god invisibility
/impulse 101 gives weapons and stuff.
/give item
eg. /give_9mmhandgun 357
9mmhandgun
mp5
shotgun
If it says command unknown that means you wrote it wrong and if it does nothing that means you have to right sv_cheats 1 and save it and load it.
More tricks, tips and cheats for this game are right here - Half-Life cheats
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