Abyss Crawlers Plus

Due to the Great War, human being had to shift their living place
to the underground towns they have created. However, the underground
society is now about to self-destruct. The protagonist heads
to the above-ground world, through the dungeon filled with monsters.

A little girl Lily explores around the dungeon with beating monsters.
Let's beat the monsters with robot, sword, gun and trained body.
roguelike action game.