Triopoly: https://boardgamegeek.com/boardgame/3758/triopoly

The description says "three-dimensional" but I would argue that it's two-dimensional and regular Monopoly is one-dimensional (linear). I think with a lot of time on your hands, you could make Monopoly truely three-dimensional with layers, and then even four-dimensional with cards/rules that rewind/fastfoward/fork time.

4-dimensional Monopoly.

Reminds me of Continuum series. Is getting a seat in the Corporate Congress a victory or defeat condition?

> four-dimensional with cards/rules that rewind/fastfoward/fork time

Or use a fourth spatial dimension, like a 4D Rubik's Cube or Miegakure.