Novels like The Untethered

All share Mystery, Portal Fantasy / Isekai and LitRPG

Dungeon Tamer: The Lumberjack's Law
3.88
The Scaleforged Legacy
4.47
Everrain Reincarnation
4.53
Mythshaper
4.58
Rise of The Living Enchantment
4.48
The Lone Wanderer: A World-hopping LitRPG Adventure
4.48
I Made A Railgun with Lightning Magic (LitRPG / OP MC / Isekai)
4.37
God Of Velmoryn
4.20
We are Void
4.25
Tales of the Endless Empire
4.12
Sins of the Forefathers: A LitRPG Fantasy Isekai
4.33
Divine Necromancer
4.39