The Codex is a series of entries for background information in Doom (2016), Doom Eternal, and Doom: The Dark Ages.
Doom (2016) Entries[]
Doom Eternal Entries[]
The Ancient Gods - Part One[]
The Ancient Gods - Part Two[]
Doom: The Dark Ages Entries[]
Related achievements/trophies[]
| Icon | Name | Description | Gamer Score | Trophy |
|---|---|---|---|---|
| - | If Only I Could Read… | Collect all physical Codex pages in a single save slot. | - | - |