#Overlord. An #anime adapted from a light novel (which appears to have started as a web novel).

The main character is a salaryman who used to be the head of an online guild and played as some sort of lich.

One day, when the game is about to come to an end, and after the other members of the guild had already left, he's transported to another world (as his game character) along with his guild's NPCs / guild.

Surprisingly for that world, while his level is 100, the levels of the native inhabitants are far, far lower.

I've read the web novel, light novel, and seen the anime.