The Data Logs are tracked separately in the “Codex” menu of the pause screen (they aren’t tracked in chapter select). In chapter select you can see how many collectibles you have found per level. You don’t have to pick it up again when you die. It’s okay if you miss a few of those.Īs soon as you pick up a collectible it will be saved instantly and you can exit the mission without having to reach the next checkpoint. You don’t need every single secret to fully upgrade everything. The secrets will give you weapon upgrade points. Some are still hard to find because you need to use switches that aren’t marked. The Praetor Upgrade called “Full View” reveals the collectible locations on the map (except for Secrets). This makes them an important part of the game. For two of the trophies “Overclocked” & “Argent Fiend” you have to find all Argent Cells and Elite Guards in one campaign playthrough! So make sure you don’t miss anything.Īll collectibles (except for dolls & data logs) let you upgrade your gear. This level contains a secret exit leading to E1M9: Military Base.

It was designed by John Romero and uses the music track 'Dark Halls'. E1M3: Toxin Refinery is the third map of Knee-Deep in the Dead in Doom. You can get everything via chapter select at any time. Mission 1: Hangar Mission 2: Nuclear Plant Mission 3: Toxin Refinery (Exit to Secret Level. For other maps which occupy this slot, see Category:E1M3.

Doom toxin refinery secrets