Pickups and perks. maybe perk machines. Just like call of duty World at War. perk-a-cola machines for faster reloads and faster shooting. maybe a juggernaut thing faster sprint. stuff like that. you could just reskin the vending machine in gmod to make it look cooler too. and for pickups you could spawn them thru the Q menu it would be like max ammo and idk npc killer or something.

Ye’ thirsty partner?!!?!?

I would make the perk machines if I knwe how to make the perk system haha.