Everest vs Fallout 4 Script Extender (F4SE)

Everest is a free, open-source mod loader and modding API for Celeste. It lets players use mods with custom maps, texture replacements and code-driven additions such as sound effects, graphics, dialogue and campaigns, without changing original game files. An in-game updater and dependency downloader help manage mods. The cross-platform Olympus installer can install mods with one click from its Download Mods section or GameBanana, or from ZIP files and folders; players can also switch between Everest and vanilla Celeste through Olympus or the title screen. Everest supports Windows, macOS and Linux and works with Celeste from itch.io, Steam and Epic Games, but not the Windows Store version. Enhanced Debug Mode offers live map reloading, code and asset reload shortcuts, an improved map viewer and console logging. The project is MIT-licensed and maintained by volunteers. Olympus is actively being worked on and may fail, and the project directs users to the Celeste Discord’s #modding_help channel for bug reports and questions.

Fallout 4 Script Extender (F4SE) is a free Windows resource for Fallout 4 modders who need expanded scripting capabilities. It extends scripting without changing the game’s executable files on disk. Listed interfaces include the Papyrus plugin API and hooks for Papyrus, Scaleform, and the classic script system. The homepage lists build 0.7.9 for Fallout 4 runtime 1.11.240. F4SE supports Fallout 4 releases from Steam and GOG, while MS Store, Game Pass, Epic, and other Windows Store versions are unsupported because those applications do not provide required APIs. Native code plugins require updates from their creators for runtime 1.10.980 and later, and plugins must have publicly available source code. Injection loads mods and may trigger poorly written virus scanners. Additional utilities include a command-line BA2 archive extractor and PEX script disassembler. The project is provided as-is and directs installation questions to its subreddit.