Here's another somewhat late review of what went up on the Doom Wiki back in October, and also covering the first half of November since this is so late, and October itself was a bit slow.
Core Content
Doom 64: Official Game Secrets
Doom Battlebook
Doomsday Champion medal
Wrong sound origin for switch/button presses
Source Ports
Doom for the DC
Doom (2016)
Ammo dispenser
Argent Breach
Container
Demon