https://ifdb.org/viewgame?id=4gvxr278ukyobiy

Join esteemed mad scientist Dr Ludwig as he faces the greatest challenge of his nefarious career: making a deal with the Devil and coming out on top. Research demonology! Read legal documents! Face off against the world's least effective torch and pitchfork-wielding mob! All this and more!

A short, but very clever, story about making a deal with the Devil and coming out on top. This particular piece of IF has a tricky central puzzle, but leads you up to it gently with a sequence of easier ones that will get you in the right frame of mind. Good for an afternoon's blasphemous fun.

Play in browser or download gblorb file (the latter requires a Glulx interpreter).