Baldur's Gate 3 Script Extender vs Fallout 4 Script Extender (F4SE)

Baldur's Gate 3 Script Extender adds Lua and Osiris scripting support for mods in Baldur's Gate 3. A mod can enable Lua with a feature flag and load bootstrap scripts for the client and server. The extender keeps separate Lua states for the game server and each client, and its console can run Lua code and registered console commands. Configuration options provide Lua and Osiris debugger interfaces with configurable listening ports, and logging options can write Osiris activity, runtime output, story compilation and compilation errors to files. An EnableAchievements option can re-enable achievements in modded games. SendCrashReports defaults to true and uploads minidumps to a crash report collection server after a crash. Installation involves extracting DWrite.dll into the game's bin directory. The extender updates when the game launches by downloading and applying an update. It supports Windows and Linux via Proton, but does not run on game versions older than patch 5; new versions target the latest game version. It is free to obtain under a license that includes the MIT License and a Commons Clause restriction on selling the software or substantially derived products and services.

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.