(This is Option A)
you need a barrier or prop with collision a zone and at least
3 checkers
your not going to regret it once you understand why
now you choose the checkers to check for items and you then wire them up to each other like this
and then once all connected, connect the last checker to your wall and do this for barrier
or this if you are using prop
now the items that it will check must pass all checks to open door and this is why you need atleast 3 since now you need 3 specific items to open it instead of 1 which is LAME
Option B
You grab an item granter a button or trigger and like last time 3 checkers.
now you wire the checkers like option A but now you wire the last checker to the item granter
now wire your button to the first checker
And thats it For option B
Option C
Connect the checkers to anything you want!!
Hope you Enjoy this guide and Merry christmas. I got Christmas tree Gim
and this is meant for a singleplayer game since it might detect others inventory