pick me up - he build civilization(?) I guess on the game he's transmigrated to.
https://www.mangago.zone/read-manga/pick_me_up/
https://www.mangago.zone/read-manga/chronicles_of_heavenly_demon/
MC build his clan
https://www.mangago.zone/read-manga/all_rounder/
MC build civilization in apocalypse
https://www.mangago.zone/read-manga/the_king_of_cave_will_live_a_paradise_life/
MC build civilization in cave
https://www.mangago.zone/read-manga/return_of_the_legendary_spear_knight/
MC building his kingdom
https://www.mangago.zone/read-manga/dungeon_odyss/
MC build his dungeon
Rec me any manga/manhwa where the mc builds some kind of empire. Business, cities, civilization, etc. (づ ̄ ³ ̄)づ. It would be better if it doesn't have harem or romance.