In Doom Eternal, you have the possibility to activate different cheat codes when you play. These codes can make you invincible, give you an infinite number of ammunition and many other things that you will find later. To activate a cheat code in Doom Eternal, you simply have to go to the stronghold and interact with the mission selection screen there. It is here that it is possible to activate the different cheat codes of the game. But be careful, to activate a code you must have unlocked it beforehand. Indeed, in some of the missions of Doom Eternal hide secret diskettes that allow players to unlock and activate cheat codes as they wish. You will find below the list of all the "cheats codes" of the game with their effects once active and the list of missions where you are sure to discover these famous diskettes containing cheat codes.
The list of Doom Eternal cheat codes and their in-game effects:
Note that by activating one or more cheat codes, you do not block progress in the missions. You can therefore complete the missions at 100% with the active codes without taking your head and even complete the secret confrontations, those that are timed. Keep in mind, though, that you won't be able to use Slayer Keys to participate in Slayer Gate Showdowns with Asset Cheat Codes.
☆ Note – By finding all cheat code diskettes in missions, you will be able to unlock a full game built into Doom Eternal. More on this on this page: Doom Eternal Tip How To Unlock Both Doom Games 1 And 2 On The Old Computer In The Fortress.
Here is the list of codes to unlock:
| Cheat code | In-game effect | How to unlock/find it |
| Infinite Extra Lives | the player has infinite extra lives | The floppy disk can be found in the "hell on earth" mission (mission number 1) |
| IDDQD | Sentinel armor is active during the entire mission | Unlocked by finding the floppy disk in the "adept base" mission (mission number 3) |
| Instant stun mode | Demons are instantly stunned by a missile, explosion or fiery spitter hit, or by Rush. It has no effect on unique bosses. | You will get it by finding the diskette in the mission "Nekravol part 2" (mission number 11) |
| all runes | All runes are unlocked | You will find the floppy disk hidden in the fortress by unlocking one of the outfits (outside the fortress) with sentry batteries |
| Infinite ammo | All weapons have infinite ammo | To be unlocked in the “super gore nest” mission (mission number 5) |
| IDKFA | All weapons are unlocked and mastered and all equipment is unlocked | Can be found in the "Arc Complex" mission (mission number 6) |
| Power Assault Mode | the infinite assault power is active during the entire mission | You can unlock this cheat code by looking for the floppy disk in the “Mars Core” mission (mission number 7) |
| Silver Bullet Mode | Stunned demons die in one hit after being hit by a projectile, explosion, fiery spitter, or Rush | Unlocked by finding the floppy disk in the "Doom Hunter Base" mission (mission number 4) |
| Fully upgraded armor | All Praetor Armor abilities are unlocked | Unlocks by finding the floppy disk in the fortress, go to the back room of the place where you select the missions. You will come to an energy tube with a key inside. Aim for the windows up on the sides, you'll see a red dot. Pulling on it will unblock a current of hot air on the ground which will allow you to catch the floppy disk in height |
| Overload power mode | the Infinite Overload power is active throughout the entire mission | Obtained by finding the hidden floppy disk in the "Taras Nabad" mission (mission number 9) |
| Mode famine | Demons no longer drop health or armor on death | You will unlock this code by discovering the hidden floppy disk in the “Nekravol” mission (mission number 10) |
| party style | Demons explode into a cloud of confetti on full or partial flesh explosions, limb loss, and fatal headshots | You will get it by finding the diskette in the mission "Nekravol part 2" (mission number 11) |
| Berserk power mode | You have an infinite Berserk power at the start of a level. Only works in "Hell on Earth", "Exultia", "Super Gore Nest", "ARC Complex", and "Mars Core" missions | You will unlock this cheat code by discovering the diskette that is hidden in the "URDAK" mission (mission number 12) |
| Mode QuakeCon | An invisible public encourages you according to the way you play | To get it, you will have to unlock all the armor upgrades that are obtained by spending Praetor armor points |
