[amoruso]

Greg Egan wrote a few of those.

https://en.wikipedia.org/wiki/Orthogonal_(series)

https://en.wikipedia.org/wiki/Diaspora_(novel)

Diaspora starts in this universe but ends up somewhere else.

[danbmil99]

Greg Egan is great. Strongly recommend Permutation City. Predating The Matrix, they build simulated worlds which then bootstrap themselves into alternate realities. The physics are not the same as our physics but similar.