What do you suppose would happen if you tried it on a game that doesn't have 25 years of walkthroughs written for it?
My suggestion concerns the poor performance DougHaber mentioned: if 9:05 can’t be solved, something else must be wrong with his experiments.
I’ve tried three dozen games, and it’s still hard to find ones suitable for LLM benchmarks. With non-linear complex text-adventure games, my guess is, that they get stuck in an endless loop at some point. Hence, I just test the progress in the first hundred steps.