On this page of our guide to Doom Eternal we describe one of the biggest easter eggs of the game - you can learn how to play the classic versions of Doom 1 and Doom 2 Hell on Earth from the 90's. These games are located on a PC in the Fortress of Doom, and to unlock File 1 and File 2, which contain classic Doom titles, you need to complete a few steps.
How to play Doom 1 in Doom Eternal?
The most important information is that you have to collect all floppy disks if you want to play the classic Doom 1. As a reminder, floppy disks are one of the collectibles / secrets in Doom Eternal. You can find them on various maps along with other secrets. In total, you can find 14 floppy disks. If necessary, read the Secrets section of our guide.
You can easily check your current progress in finding floppy disks in the Fortress of Doom. Select the Mission Select terminal and press the code activation button until the highlighted stage - press Square button while playing on PS4. All floppy disk fields should be filled - this is shown in the screenshot above.
You can find information about obtaining floppy disks with cheat codes in a separate chapter of our guide Cheat codes.
You must visit Doom Slayer's headquarters aboard the Fortress of Doom. It is located directly below the Captain's Bridge and is shown in the screenshot above.
You must be interested in the old PC depicted in the picture.
Interact with the computer.
- If you don't have all floppy disks then File 1 (left Square) will not be available.
- If you have collected all floppy disks with cheat codes, then you will see a Doom 1 icon instead of the floppy disk with a question mark on File 1. Select it.
The unlocked game is actually The Ultimate Doom from 1995, the final version of Doom 1.
How to play Doom 2 Hell on Earth in Doom Eternal?
The option to play the 1994 classic version of Doom II: Hell on Earth is also initially disabled in Doom Eternal. You need to get back to the PC located in Doom Slayer's quarters aboard the Fortress of Doom.
This time you have to choose File 2 - a square on the right with a question mark and a floppy disk icon.
You will be prompted to enter a password - the secret code required to unlock Doom 2 is FLYNNTAGGART. Pick the letters one by one until you can type in the password.
If you have entered the password correctly, the Doom 2 icon will appear where File 2 is located. Select it.
Now you can play Doom 2: Hell on Earth.