DarkRadiant

Free#8 of 25 in Game Modding ToolsGame Level Editors

DarkRadiant: A deep cross-platform editor for Dark Mod maps, gameplay, and fan missions. Ranked #8 of 25 in Game Modding Tools by our editors (8.2/10); pricing: Open source; best for dark Mod level and gameplay authoring.

8.2/10★★★★☆Editor score

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At a glance

• Editor score
  8.2 / 10
• Pricing
  Open source
• Best for
  Dark Mod level and gameplay authoring
• Paid from
  Free
• Archive extraction
  Yes
• Facts checked
  20 Sep 2026

• Where it wins

  • Specialized editors for objectives, AI, conversation, and Stim/Response
  • Combines 2D/3D mapping with lighting, media, models, and prefab tools
  • Open-source and available on Windows, Linux, and macOS

• Where it doesn't

  • Its focus is limited to Doom 3-based games and The Dark Mod
  • The feature set may be more than needed for simple map edits
  • Gameplay authoring is centered on The Dark Mod's systems

Our verdict on DarkRadiant

DarkRadiant is an open-source level editor for The Dark Mod and Doom 3-based games. It is aimed at game mappers and fan-mission creators who need to build and edit maps while also authoring gameplay. The editor provides 2D and 3D map views, brush, patch, entity, and lighting tools, plus browsers for media, models, entity classes, skins, and sounds. Layers, grouping, selection sets, and prefab creation support organized scene construction across larger editing projects.

Its strongest distinction is the set of The Dark Mod gameplay editors. Dedicated tools cover objectives, difficulty, conversations, readables, AI, and Stim/Response systems, giving Dark Mod creators a focused authoring environment rather than a map editor alone. A particle editor includes real-time preview, while the Python script interface offers an additional path for extending workflows. These features make DarkRadiant a strong fit for creators working inside The Dark Mod's level and gameplay systems. Users focused on unrelated game engines or non-Doom 3-based projects should look for tooling built around their target platform instead.

DarkRadiant also supports map-oriented asset workflows, including import and export of idTech map formats and selected-geometry export to ASE, LWO, and OBJ. Its listed formats include MAP, PK4, ASE, LWO, OBJ, PFB, and PROC, and archive extraction is supported. The published project details identify Windows, Linux, and macOS support, with version 3.9.0 listed as the latest release. As open-source software, it suits creators seeking a dedicated, no-cost tool for Dark Mod authoring; it is less appropriate for teams seeking a commercial editor with broader engine coverage or a general-purpose game development suite.

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DarkRadiant pricing

DarkRadiant fact sheet

Alternatives to DarkRadiant

• StarCraft II EditorA broad free toolkit for building, scripting, testing, and publishing StarCraft II content.9.4
• DWDota 2 Workshop ToolsA complete free toolkit for building, testing, and publishing Dota 2 mods.9.2
• OpenMW-CSA free, open-source editor for deep OpenMW mod and game authoring.9.0

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DarkRadiant vs the competition

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Featured on iTechGuides

DarkRadiant is listed in our Game Modding Tools directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update