洞窟物语

Cave Story (洞窟物語 Dōkutsu Monogatari?) is a freeware platform-adventure video game released in 2004 for the PC. It was developed over five years by Daisuke "Pixel" Amaya in his free time. Cave Story features 2D platform mechanics and is a homage to the classic games that the author played in his youth, such as Metroid.
After its initial self-published release, Cave Story slowly gained popularity on the Internet. It received wide critical acclaim for its compelling story and gameplay. Independent developer Nicalis worked with Amaya to port the game to WiiWare and DSiWare in 2010. An enhanced version, Cave Story+, was released for Steam in November 2011, with a Nintendo 3DS release in October 2012. A 3D remake of the game, titled Cave Story 3D, was developed by Nicalis and published by NIS America for the Nintendo 3DS in November 2011.
The game focuses on an amnesiac protagonist who awakens in a cave. Through his explorations, he discovers a plot by the Doctor, a megalomaniac who intends to force the inhabitants of the cave to fight for him in his bid to conquer the world. The protagonist is thrust into the position of savior as he endeavours to defeat the Doctor.