Originally Posted by oDrPepper
There are some collectibles that don't have ?'s as they are in the same room as something else which stops the ? appearing.
I'm pretty sure the Pass Key you're missing is in the Scuba Mask room, as for the Missile Upgrade there is one under the floor in one of the save rooms. Just go around each save room and check for it. Sorry I can't give you the exact one as I can't remember
That was exactly the pass key I needed. thanks very much, I appreciate it. as for that guy moaning, have you got nothing better to do, like I said, I posted in the im stuck thread. which is a thread for posting questions if you are stuck. which I was, so I did. and got the answer I was looking for, no thanks to you mind.