We played a D&D adventure set on another planet, as he requested. So, basically, a dungeon with jet packs and radiation.
The guy hit 0 hp in the first twenty minutes by continually trying to open a box while some tough space pirates attacked him. (In the games with him, when you hit 0 hp, you just lose all of your stuff and wake up in a jail, video game-style.) I don’t think he’s great at making hp projections based on average damage rates right now.
His guy woke up in a prison tube, broke out to find himself in a locked room, then hid in a secret ceiling compartment.
Then, when the space pirates came in to check on him, he cast Disguise Self to appear to be Ninja, one of the space pirates, then walked out with them.
He ditched the space pirates by running across a chasm on a spider web (evading the phase spider on it), got beat up some by a blob monster, then helped an alien scavenger cross the bridge above the spider by once again exploiting his Ninja disguise to dismiss the space pirates collecting tolls on the bridge.
He’s still really excited about things like finding a locked door with a green slot and unlocking it by putting in a green keycard. So, I don’t have to work all that hard on the mysteries.