Cavestory Multiplayer Modbase Documentation (Updated August 21st, 2025)

Introduction

Welcome to the documentation for Cavestory Multiplayer modding tools!

Important Notes

Cavestory Multiplayer is compiled using the Visual Studio 2019 (v142) Platform Toolset. It's important to compile using the same toolset, otherwise some symbols won't match, causing the game to not load the DLL you make.

You must give the DLL the same name as your mod's folder! For example, if your mod is in a folder called 'mymod', then you should compile to 'mymod/mymod.dll'.

Modding Help

Getting Started
CaveEditor 2 Overview
Cavestory Character Editor

License

Cavestory Multiplayer API by Johnny "Clay Hanson" Ledger

This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software.

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.