Flexible level editor

• UpdatedFeb 20, 2026
• C++

Modern, lightweight and efficient 2D level editor

• UpdatedNov 14, 2025
• Haxe

Cross-Platform Level Editor

• UpdatedFeb 18, 2026
• C++

Realtime-CSG, CSG level editor for Unity

• UpdatedJul 21, 2025
• C#

Work in progress prototype for the Chisel Level Editor, for Unity

• UpdatedOct 5, 2024
• C#

Unity importer for the LDtk level editor

• UpdatedJan 25, 2026
• C#

The open-source, cross-platform level editor for id Tech based games.

• UpdatedJan 14, 2026
• C++

Dust Racing 2D is a traditional top-down car racing game including a level editor.

• UpdatedJan 26, 2026
• C++

An open source alternative to Valve's Hammer Editor for the Goldsource engine. (No longer in development)

• UpdatedSep 16, 2019
• C#

Your Own Level Editor Creation Kit

• UpdatedJan 15, 2026
• Rust

DarkRadiant is the map editor for The Dark Mod and other idTech4/Doom3-based games

• UpdatedFeb 20, 2026
• C++

an editor for cooked unreal engine 4/5 maps

• UpdatedDec 13, 2024
• Rust

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.

• UpdatedApr 14, 2024
• C++

Free procedural level generator for unity

• UpdatedJan 26, 2024
• C#

Unity level design plugin that adds support for Quake .MAP / Half-Life .RMF / Source .VMF, Q1 HL1 .WAD textures, and .FGD export.

• UpdatedJan 8, 2026
• C#

Uses the collider of a PolygonCollider2D to generate a mesh for a Unity GameObject.

• UpdatedJul 14, 2019
• C#

A set of modding tools (level editor, etc) for the Ratchet & Clank PS2 games.

• UpdatedJan 13, 2026
• C++

Advanced, but simple to use, runtime level editor for Unity.

• UpdatedMay 16, 2023
• C#

A tilemap editor that aims to be simple, fast and lightweight.

• UpdatedDec 28, 2025
• C++

Chisel CSG Level Editor, for Unity

• UpdatedOct 20, 2025
• C#