Novels like Theory of Rifts

All share LitRPG

Cultivator Andy
4.52
Also GameLit and Cultivation
Taming Destiny - a Tamer Class isekai/portal survival fantasy.
4.46
Also Portal Fantasy / Isekai and Progression
Infinite Realm: Monsters & Legends
4.53
Also GameLit and Cultivation
12 Steps to Transcendence: A Skill-Grinding LitRPG
4.31
Also GameLit and Cultivation
Unfathomable Senior
4.05
Also Adventure and GameLit
Conduits
4.54
Also Action and Portal Fantasy / Isekai
Markets and Multiverses (A Serial Transmigration LitRPG)
4.55
Also GameLit and Portal Fantasy / Isekai
Universe's End
4.51
Also GameLit and Cultivation
Riftside
4.35
Also GameLit and Portal Fantasy / Isekai
Explorer of Edregon (Book 5 Complete!)
4.55
Also GameLit and Portal Fantasy / Isekai
Rising Kite - A story from the world of HWFWM
4.66
Also Cultivation and Progression
Nuclear Son
4.49
Also GameLit and Portal Fantasy / Isekai