[eru]

In a less principled way, there's also 'Antichamber' and 'Tea for God'.

Both use Escher-like spaces that are locally Euclidean but don't connect in proper ways. Eg if you go 360 degrees around a column, you might arrive at a different place in the level from where you started.

In Antichamber it's an interesting gimmick. In 'Tea For God' the mechanic is actually useful, because it's a way to fold a big level into the small boundaries of the VR space you defined on the Oculus Quest in your living room.

[zenorogue]

Here is my blogpost on various weird geometries used in games: https://medium.com/@ZenoRogue/non-euclidean-geometry-and-gam...