I’m assuming if you have the item in your inventory already, you know how to make an item that can be picked up and added to your inventory. As mentioned by Alexarg use the Find Items in inventory by class. 's an example I use for something else but you can use the same idea. Just use the by class node instead of the one I’m using and in the bottom left where mine has itemdata, just choose the key card. If the player has one, then make a bool set to true and then the door opens if its true… etc.
