There are 4 games, Goblin Burrow, Goblin Burrow I'll Borne, Goblin Burrow The Fable, and Goblin Burrow Sengoku Gakidou. The girls are all different in each game. The original game is a vanilla fantasy setting, I'll Borne is a sequel/standalone expansion with all new girls, many of whom have relations to characters from the first game. The Fable has all the girls derived from fairy tales, and Sengoku Gakidou which will be out in a couple weeks is set in 16th century Japan with gender bent historical figures.