How To Mod Cave Story+ (Steam) In 2026

Cave Story+ has been updated in 2026, bringing the exclusive content from the Switch version, causing the CS+ code to change drastically.

This thread will compile all the information on how to modify this version, including tools, documentation, and more.

Spoiler: Information and documentations

1. Official CS+ Documentation By Clownacy
2. Official CS+ TSC Documentation By Clownacy

Spoiler: Modding Tools

1. Booster's Lab Plus By Clownacy

Spoiler: Compatible Mods and Patches

None

 

There's a fork of Booster's Lab which supports the 2026 update here. Its 'tsc_list.txt' file has been updated to support the new TSC commands, so Booster's Lab will show proper help information for them.

 

There's a fork of Booster's Lab which supports the 2026 update here. Its 'tsc_list.txt' file has been updated to support the new TSC commands, so Booster's Lab will show proper help information for them.

Thanks for the information!
I've added them in the spoilers above.