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Games like Multiplayer Add-on Platformer

Add fragment shader point lights to your 3D GMS2 projects
Raw Input
Use multiple mice and keyboards in GameMaker games!
Fully commented and working shooter engine with clever shooter and stealth based AIs
Error handling for GameMaker games
Gamemaker Studio 2 Camera and visual editor: Follow objects, screen shake, view scaling, screen effects, etc
Package GameMaker rooms and load them as you please
A customizable hologram effect for GameMaker Studio 2.
Create one sprite, have unlimited possibilities!
A fancy pixel dissolve effect with many uses
Dynamic scripting on Win/Mac/Linux.
Get information about the player's screen(s)!
Easily create dynamic textured destructible terrain!
An Echo/Delay processing audio effect for GameMaker Studio 2
10 Songs, 74 Loops, 77 Instrument Tracks
It's really bouncy
Extension to connect GameMaker Games (even HTML5!) to Twitch chat
Auto-organize audio files in compiled GMS games into directories