id Software and Activision have released a new patch for DOOM III which adds PunkBuster and EAX ADVANCED HD support, fixed ragdoll bounciness and more (check full article for changelog). An updated SDK is also available for Linux and Windows.

DOOM III v1.3 Patch for Windows (32.41MB)

DOOM III v1.3 Patch for Linux (16.4MB)

DOOM III SDK v1.3 for Linux (10.49MB)

DOOM III SDK v1.3 for Windows (5.21MB)