Cave Story: Doukutsu Monogatari
Cave Story is a game in the Metroidvania platform-adventure genre, first released on PC in 2004. The game is set in deep dark caves on a floating island. The island is inhabited by a race of intelligent rabbit-like creatures called Mimigas.
Controlling the main character with a gamepad or a keyboard, the player explores an amazing and mysterious world, simultaneously solving platformer-puzzles and defeating enemies. In the world of the game, several types of weapons are available, and a victory in a duel with a foe will bring experience points. In the rest - Cave Story is a classic 2D platformer with polished controls and an interesting setting.