Cave Story (Freeware)The original release of Cave Story. Game Downloads
Cave Story WiiWarePorted to the Wii with a new translation, upgraded double resolution visuals, new modes, multiple save slots, and remixed music. Plus you can mix and match new visuals and music with the originals. Sadly the WiiWare platform was shut down, so this can no longer be purchased.
Cave Story+Cave Story WiiWare ported to PC, Linux and Mac with new modes, including Pixel's Wind Fortress. Humble Store Listing Steam Listing GOG.com listing Epic Games Store Listing
Cave Story DSiCave Story ported to DSiWare with the game modes and translation from Cave Story+. Sadly the DSiWare platform was shut down, so this can no longer be purchased. Nintendo of Japan's Game Listing Cave Story DSi Official Site (Japanese) [archived]
Cave Story 3DCave Story on the Nintendo 3DS (physical release) with new 3D graphics, new or expanded areas, slightly increased difficulty, new item locations, new music remixes and a time attack mode.
Japanese release exclusively contains crossover content from Crazy Climber, Ikki, and Dragon Slayer. Cave Story 3D Official Site Cave Story 3D Official Site (Japanese)