Flexible level editor
Modern, lightweight and efficient 2D level editor
Cross-Platform Level Editor
Realtime-CSG, CSG level editor for Unity
Work in progress prototype for the Chisel Level Editor, for Unity
Unity importer for the LDtk level editor
The open-source, cross-platform level editor for id Tech based games.
Dust Racing 2D is a traditional top-down car racing game including a level editor.
An open source alternative to Valve's Hammer Editor for the Goldsource engine. (No longer in development)
DarkRadiant is the map editor for The Dark Mod and other idTech4/Doom3-based games
Uses the collider of a PolygonCollider2D to generate a mesh for a Unity GameObject.
tiny_csg is a C++ library that generates meshes from brush-based level data and supports incremental updates (real-time CSG). It is intended to be used as a backend in 3d level editors and/or generators.
Unity level design plugin that adds support for Quake .MAP / Half-Life .RMF / Source .VMF, Q1 HL1 .WAD textures, and .FGD export.
Free procedural level generator for unity
an editor for cooked unreal engine 4/5 maps
Advanced, but simple to use, runtime level editor for Unity.
A tilemap editor that aims to be simple, fast and lightweight.
A set of modding tools (level editor, etc) for the Ratchet & Clank PS2 games.
Monogame importer, renderer and code generator for LDtk Level editor
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