Players: 2

Equality: Unequal (the "victim" is guaranteed to get messy)

Setup:
-designate one player as the "victim" and one player as the sadistic "game master" (GM)
-Prepare two pies: one "sweet" pie end one "nasty" pie using savory ingredients. The nasty pie can be anything but should be gross.
-Prepare a "nasty" bucket of something - I recommend a savory slop bucket. This bucket is the final punishment and should be genuinely scary!
-Prepare two post-it notes: one says "winner" and the other says "loser"

The Game: the victim takes their place in the hot seat. The GM secretly assigns one post-it note to the bottom of each pie (such that one pie is the "winner" pie and one is the "loser" pie). Importantly, the nasty savory pie is not necessarily the loser and the sweet pie is not necessarily the winner - either pie could be the "winning" pie!

The victim then chooses one of the pies - either the nice sweet pie or the nasty savory pie - to pie themselves with! The object of the game is for the victim to pick the "winner" pie. The victim is therefore guaranteed to take at least one pie in the face.

Once the victim has been sloppily pied, they look at the bottom of the tin to see if they won. If they picked the winner pie, they get to turn the tables on the GM with the remaining pie AND the nasty slop bucket! If the victim picked the loser pie, then no such luck - they take the remaining pie plus the slop bucket and the GM remains clean!

Strategy: Both the GM and victim are presented with hard choices.
-The GM has the option of forcing the victim to take the nasty pie no matter what, by making the nasty pie the "winner." But if the victim anticipates this and is willing to accept the savory pie, the GM risks having to face the nasty slop bucket.
-Meanwhile the victim is given an uncomfortable choice. Do they willingly accept the nasty pie or do they take a chance on the sweet pie? Either way they risk the slop bucket and the humiliation of having chosen incorrectly.
-I recommend the GM and the victim spend a fair bit of time talking and teasing each other before the victim chooses their pie. This is a bluffing game after all! Bluff, double-bluff, or triple-bluff your opponent into making the wrong choice, or simply tell the truth!

Have fun! If you end up playing, let me know how it went!