MelonLoader vs UE4SS

MMelonLoader9.4Visit UE4SS8.4Visit

Higher score M MelonLoader #1 in Game Mod Loaders 9.4/10 Free plan Free plan✓ 3 of 4 features Visit MelonLoader

vs

UE4SS #6 in Game Mod Loaders 8.4/10 Open source ✓ 1 of 4 features Visit UE4SS

• MelonLoader fits best

  Broad Unity mod loading

• UE4SS fits best

  Unreal Engine game modding

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Side by side

Feature	MMelonLoader 9.4/10 Visit ↗	UE4SS 8.4/10 Visit ↗
At a glance
Editor score	9.4	8.4
Ranking	#1 in Game Mod Loaders	#6 in Game Mod Loaders
Best for	Broad Unity mod loading	Unreal Engine game modding
Pricing model	Free	Free
Starting price	Free plan	Open source
Free plan	✓ (best)	Not checked yet
Free trial	—	—
Deployment	Desktop, Self-hosted	Desktop
Platforms	Windows, Linux, macOS, Android	Windows
Support	Community, Docs	Community, Docs
Built for	Solo, Small business	Solo, Small business, Mid-market, Enterprise
Features MelonLoader 3/4 · UE4SS 1/4
Plugin support	✓ (best)	Not checked yet
Load-order control	✓	✓
Mod profiles	Not checked yet	Not checked yet
Dependency handling	✓ (best)	Not checked yet
Specs
Supported games	Unity games using Mono or Il2Cpp	Not checked yet
Supported platforms	Windows, Linux (WINE/Steam Proton/native), macOS, Android and Oculus Quest (WIP)	Windows
Mod loading method	Injection	Injection
Our review
Pros	Supports Unity Mono and Il2Cpp games Offers plugin loading, dependencies, and load ordering Runs on Windows, Linux, macOS, and Android	Lua and C++ APIs support script-based and native mods Blueprint loading, actor spawning, and live property editing Automatic or manual injection with configurable mod ordering
Cons	Android and Oculus Quest support is work in progress Requires game-installation folder and loader setup Focused on Unity games rather than broader game engines	Windows is the published supported platform Injection requires installation alongside a game executable The broad Unreal Engine scope may require game-specific compatibility checks
Our verdict	MelonLoader is an open-source mod loader for Unity games built with Mono or Il2Cpp. It is designed for game modders and plugin developers who need to load mods from a game's installation directory, manage plugins, and control how… Read the review →	UE4SS is an open-source modding system for Unreal Engine 4 and 5 games, aimed at players and developers who want to load, create, or debug mods on Windows. It injects into supported game processes and combines Lua scripting with a C++… Read the review →

Strengths and trade-offs

• MelonLoader — where it wins

  • Supports Unity Mono and Il2Cpp games
  • Offers plugin loading, dependencies, and load ordering
  • Runs on Windows, Linux, macOS, and Android

  Where it doesn't

  • Android and Oculus Quest support is work in progress
  • Requires game-installation folder and loader setup
  • Focused on Unity games rather than broader game engines

• UE4SS — where it wins

  • Lua and C++ APIs support script-based and native mods
  • Blueprint loading, actor spawning, and live property editing
  • Automatic or manual injection with configurable mod ordering

  Where it doesn't

  • Windows is the published supported platform
  • Injection requires installation alongside a game executable
  • The broad Unreal Engine scope may require game-specific compatibility checks

• MMelonLoader9.4/10 · Free plan

  A flexible Unity mod loader with plugins, dependencies, debugging, and cross-platform support.

  Visit MelonLoaderFull verdict →
• UE4SS8.4/10 · Open source

  A deep Unreal Engine mod loader for Windows modders and developers.

  Visit UE4SSFull verdict →