GtkRadiant vs Ultimate Doom Builder

GtkRadiant8.6Visit UDUltimate Doom Builder8.5Visit

Higher score GtkRadiant #6 in Game Level Editors 8.6/10 Free plan Free plan✓ 2 of 5 features Visit GtkRadiant

vs

UD Ultimate Doom Builder #7 in Game Level Editors 8.5/10 Free plan Free plan✓ 2 of 5 features Visit the project

• GtkRadiant fits best

  Id Tech game level construction

• Ultimate Doom Builder fits best

  Doom-family mapping with terrain tools

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Side by side

Feature	GtkRadiant 8.6/10 Visit ↗	UDUltimate Doom Builder 8.5/10 Visit ↗
At a glance
Editor score	8.6	8.5
Ranking	#6 in Game Level Editors	#7 in Game Level Editors
Best for	Id Tech game level construction	Doom-family mapping with terrain tools
Pricing model	Free	Free
Starting price	Free plan	Free plan
Free plan	✓	✓
Free trial	—	—
Deployment	Desktop	Desktop
Platforms	Windows, macOS, Linux	Windows, Linux
Support	Community, Docs	Community, Docs
Built for	Solo, Small business, Mid-market	Solo, Small business
Features GtkRadiant 2/5 · Ultimate Doom Builder 2/5
Tilemap tools	Not checked yet	Not checked yet
Terrain tools	✓	✓
Entity placement	✓	✓
Prefab or template tools	Not checked yet	Not checked yet
Visual scripting	Not checked yet	Not checked yet
Specs
Level dimensions	3d	2d_and_3d
Our review
Pros	Free, open-source editor for Windows, macOS, and Linux Combines brushes, curve patches, terrain, entities, and shaders Includes the Q3Map2 map compiler and gamepack support	Combines 2D and visual 3D map editing modes Includes terrain, slope, and 3D-floor editing tools Supports scripting, analysis, entity placement, and texture browsing
Cons	Its focus is limited to games powered by id Tech engines Some games require separately installed gamepacks Community volunteer maintenance may mean a less centralized workflow	Linux support is described as experimental Focused on Doom-family games rather than broader level-editing needs Its desktop workflow may be more specialized than general-purpose editors
Our verdict	GtkRadiant is an open-source desktop editor for constructing levels in games powered by id Tech engines. It is aimed at individual modders and commercial development teams working on 3D maps, with tools for brushes, curve patches,… Read the review →	Ultimate Doom Builder is a free, open-source desktop map editor for Doom, Heretic, Hexen, Strife, and related ZDoom-family games. It is aimed at creators who need game-specific configuration support alongside classic 2D editing and a… Read the review →

Strengths and trade-offs

• GtkRadiant — where it wins

  • Free, open-source editor for Windows, macOS, and Linux
  • Combines brushes, curve patches, terrain, entities, and shaders
  • Includes the Q3Map2 map compiler and gamepack support

  Where it doesn't

  • Its focus is limited to games powered by id Tech engines
  • Some games require separately installed gamepacks
  • Community volunteer maintenance may mean a less centralized workflow

• Ultimate Doom Builder — where it wins

  • Combines 2D and visual 3D map editing modes
  • Includes terrain, slope, and 3D-floor editing tools
  • Supports scripting, analysis, entity placement, and texture browsing

  Where it doesn't

  • Linux support is described as experimental
  • Focused on Doom-family games rather than broader level-editing needs
  • Its desktop workflow may be more specialized than general-purpose editors

• GtkRadiant8.6/10 · Free plan

  A free, focused toolkit for building and compiling 3D id Tech game levels.

  Visit GtkRadiantFull verdict →
• UDUltimate Doom Builder8.5/10 · Free plan

  A capable free editor for Doom-family maps, with visual 3D, terrain, and scripting tools.

  Visit the projectFull verdict →