It is often confused with Tensei Kenja no Isekai Life (My Isekai Life), as both are written by the same author, .
In this new world, the inhabitants have completely forgotten the "optimal" ways to play. Basic skills, efficient leveling paths, and powerful class upgrades (like the Sage class) are considered lost or non-existent. Isekai Kenja no Tensei Musou ~Geemu no Chishiki...
A major theme is that the church and nobility have intentionally hidden "build paths" to keep the common populace weak. It is often confused with Tensei Kenja no