[SCRIPT] Need help debugging various script functions

[Your Computer]

For starters, you'd have to start using AddGlobalVarInt (this takes negative numbers, just like AddPlayerSanity) in place of SetGlobalVarInt. You could also remove the item that gets added automatically when the player interacts with the syringe item and replace it with something like "syr_"+GetGlobalVarInt("pick"). That way you can remove it using the same syntax and can loop through the syringes (e.g. with a for loop) and check if they're in the inventory (since there's no guarantee what order the player will use the syringes). Also, you should avoid having SetGlobalVarInt("picked", 0) in OnStart or OnEnter. By default all undefined map variables will be given null-like values when accessed. Since you're using global map variables, this implies you're going to repeat this script across multiple maps, and you wouldn't want these other maps screwing with the inventory count.