Isekai Seifukuki: Fuguu Shuzoku-tachi no Saikyou Kokka

The protagonist was playing a video game with only the bottom-ranked "Seven Unfavorable Races" as his companions—goblins, harpies, elves, etc. He built a castle, founded a country, and conquered the world. But one day, he is suddenly transported to the world of that game, and everything has been reset...!? All that remain are the "Seven Unfavorable Races" that he had originally made his minions. In order to revive "Gloria Septem"—the kingdom he once built—he aims with his companions to conquer another world a second time...!!

(Source: Flex Comix, translated)