Wipe your memory

If you could completely wipe your memory of one game so you could experience it again for the “first” time, what game would you choose?

I'm thinking old puzzle adventures like Loom, Myst, Mean Streets.
With some games there's question whether I would also forget other similar games. It's big difference whether you've dozen games like that or are experiencing the whole genre like first time.
To pick one, The Fool's Errand was mind-blowing experience with its layered puzzles within puzzles.