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A re-implementation of Cave Story (Doukutsu Monogatari) engine written in Rust.

The project is still incomplete and not fully playable yet.

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This repository does not contain any copyrighted files.

For better user experience, pre-built binaries are distributed with slightly modified freeware game files.

doukutsu-rs should work fine with pre-extracted and tweaked data files from this repository, NXEngine(-evo) extracted freeware data files and Cave Story+ data files.

Vanilla Cave Story does not work yet because some important data files have been embedded inside the executable. and we don't have a loader/extractor implemented yet.

Freeware

• https://github.com/doukutsu-rs/game-data - Freeware game data distributed with CI builds, based on those two below.
• https://github.com/Clownacy/CSE2/archive/enhanced.zip - copy game_english/data from archive to the runtime directory (place you run the executable from, usually project root)
• https://github.com/nxengine/nxengine-evo/releases/download/v2.6.4/NXEngine-v2.6.4-Win32.zip - copy NXEngine-evo-2.6.4-xxx/data from the archive to runtime directory

Cave Story+

• PC release (Steam) - (Tested only with Steam version, both Windows and Linux builds) Copy data folder from installation directory (guide for Steam) to the runtime directory.
• PC release (EGS) - (Untested, but the game is essentially the same as Steam release) Same thing as with Steam version.
• Switch release - (Tested once, no guarantee to work) You need a hacked Switch and physical release. Google should help you.

• Checkmarked things = fully implemented

• Unmarked things = partially or not implemented yet.

• Text scripts (TSC)

  • Initial implementation
  • Full implementation of gameplay opcodes
  • Shift-JIS encoding support
  • Credits opcodes

• Audio

  • Organya BGM playback
  • Text script bindings
  • CS+ style .ogg BGM playback
  • PixTone SFX

• NPCs/entities

  • Initial implementation
  • Miscellaneous entities (~40% done)
  • Bosses (~30% done)
    • Omega
    • Balfrog
    • Monster X
  • First Cave
  • Mimiga Village
  • Egg Corridor
  • Grasstown
  • Sand Zone (~50% done)
  • Labirynth (~10% done)
  • Waterway
  • Egg Corridor? (~20% done)
  • Outer Wall
  • Plantation
  • Last Cave
  • Balcony
  • Hell

• Weapons

  • Leveling / XP system
  • Initial implementation
  • Snake
  • Polar Star
  • Fireball
  • Machine Gun
  • Missile Launcher
  • Bubbler
  • Blade
  • Super Missile Launcher
  • Nemesis
  • Spur

• Saving and loading game state

• Support for different game editions

  • Vanilla
  • Modified vanilla
  • Cave Story+ (PC/Switch)
    • Base mod
    • Mod loading
    • Curly Story
    • Wind Fortress
    • Boss Run
    • Seasonal graphics
    • Co-op gameplay

(tbd)

Freeware data files:

Cave Story+ data files:

• Studio Pixel/Nicalis for Cave Story
• Cave Story Tribute Site - has lots of useful resources related to the game.
• CSE2 - widescreen fixes, more readable reference for game logic, mutual help in various things.
• LunarLambda for organism - which is being used by us as .org playback engine.