Alternatives to CLEO

The Script Extender is for Baldur's Gate 3 mod creators who want Lua or Osiris scripting support and related debugging or logging options.

MelonLoader suits people modding Unity games that use Mono or Il2Cpp and who need plugin support.

It suits Satisfactory players and mod developers using Windows clients or servers, or Linux servers.

RED4ext suits Cyberpunk 2077 mod developers working on Windows who need scripting access and plugin loading.

It suits Windows PC players and developers creating Grand Theft Auto V Story Mode scripts with .NET rather than C++.

Cyber Engine Tweaks is for Cyberpunk 2077 modders who want to write Lua scripts or use the included mod and developer tools.

Everest

Everest suits Celeste players who want custom maps, visual or audio changes, and code mods, as well as creators building that content.

It suits Fallout 4 modders working on Windows with Steam or GOG releases.

This is for Hollow Knight players who need a compatibility layer for mods, and developers building Hollow Knight mods.

ModTek suits BattleTech players who want to load compatible mods and modders working with JSON or DLL mods.

MWSE is for Morrowind mod authors who want Lua event hooks or scripting functions beyond the Construction Set.

SMAPI

SMAPI suits Stardew Valley players who want to load and organize mods, and creators who need modding documentation or source code.

It suits Hades II players who want to use mods and developers creating them.

xOBSE suits Oblivion modders who want expanded scripting and plugin support.

SFSE suits Windows players who own the Steam edition of Starfield and need additional scripting or plugin support.

It is intended for game modders loading ASI plugins into supported Windows games.

It suits Battlefield 3 owners interested in community servers, custom modes, maps, or filming and competitions.

Unity suits Java Edition players seeking a vanilla-focused resource pack with a traditional look and subtle visual changes.