Note: Unless you are using a severely outdated operating system or CPU, you most likely want to always download the x64 (64-bit) version of Ultimate Doom Builder.
The 64-bit version has less limitations on the total size of the project that you can load and edit, while the x86 (32-bit) version of Ultimate Doom Builder only exists for compatibility with older PCs.
If not sure, follow these instructions to find out whether your system is 64-bit: Which version of Windows operating system am I running?
The 64-bit version has less limitations on the total size of the project that you can load and edit, while the x86 (32-bit) version of Ultimate Doom Builder only exists for compatibility with older PCs.
If not sure, follow these instructions to find out whether your system is 64-bit: Which version of Windows operating system am I running?
All recent versions
Ultimate Doom Builder R4332
06 Oct 2026
Update old github actions to current versions (#1395)
Ultimate Doom Builder R4331
26 Sep 2026
Fix VPO native library build and loading on Linux (#1369)
Ultimate Doom Builder R4329
26 Sep 2026
Visual Mode: added map element grouping capabilities (no default keys bound) (#1383)
Ultimate Doom Builder R4328
26 Sep 2026
Make Move To Cursor action teleport to 75% of the distance to the aimed point (#1384)
Ultimate Doom Builder R4327
13 Sep 2026
Fixed URL to the ZDoom wiki in the DSDADoom UDMF, Helion UDMF, and ZDoom based UDMF game configurations.