DOOM Eternal
50 Achievements
59-72h
Master of Fasting
Complete a Mission with only the Famine Mode cheat on
3.8%
How to unlock the Master of Fasting achievement in DOOM Eternal - Definitive Guide
You have to get the Cheat Code Famine Mode first which you can find on Mission 10.
Once you have completed the game, Go back to first mission Hell on Earth on I'm To Young to Die Difficulty. Press X on the mission select to access your cheats codes. Famine Mode is third row down and second across. Make sure it's the only one selected otherwise you won't get the achievement.
You start with all your weapons you have gained throughout the game. You have to complete a few arenas to progress through but you can effectively bypass 80% of the level and just do the bare minimum to complete it.
Use mission select and activate the famine mode cheat code by pressing X at the mission select menu. Only activate this cheat alone as you will not unlock the Master of Fasting achievement if you activate other cheats besides Famine Mode.
You obtain the Famine cheat code collectible in Mission 10: Nekravol after the fifth encounter of the mission, it is near the second set of dual crusher traps.
You can not do mission select in Extra Life Mode.
The quickest level to do this on is Mission 8: Sentinel Prime on I'm too Young to Die difficulty (or any other difficulty of you choice), where you can pick up 2 extra lives along the way to the only fight of the mission, which is the boss battle against the "Gladiator". Use the Lock-On Mod Rockets and the Arbalest Mod Ballista to make quick work of him.
Should only take you 5 minutes to do.
I personally waited until after I had completed the campaign to do this. You don't have to but it makes life a little easier, even though this isn't particularly challenging. Simply select the first mission and hit X to enable the cheat (only available if you've collected it in game) . If you're using a save slot on a higher difficulty you can lower it in the pause menu once the mission starts to make things even easier. Doing this with everything you've obtained throughout your save slot makes the achievement pretty trivial. Demons will drop nothing upon death, with the exception of Chainsaw use, and regular ground pick ups are still available. Using grenades, flame belch and blood punch can save on ammo so be sure to use those when they're available. There is also a very useful Praetor Suit upgrade which grants a bit of ammo when using exploding barrels, so if you find yourself getting a little short be sure to destroy every barrel you see. Just progress through the level and the achievement will be yours.
Easy Peasy :)
To use a cheat after you have collected it, you need to go to the Fortress of Doom and then use the console to mission select. From here, press to access the cheats and then choose Famine Mode. I would recommend for the purposes of this achievement to replay the first level with this cheat on as that would make it extremely easy. What this cheat does is stop any Demons you kill dropping any health or armor after they have been killed, so you need to survive with whatever placed pickups are available, though on the first mission on the easiest difficulty, with your end game powered DOOM Slayer, this is not a problem.
Complete the level and win
The cheat codes are spread throughout the game as collectibles and the Famine Mode cheat is no different. It can be acquired on the Nekravol mission. See the description for "Gunpletionist" for a video of all the games collectibles in every level, including all of the cheats.
To use a cheat after you have collected it, you need to go to the Fortress of Doom and then use the console to mission select. From here, press to access the cheats and then choose Famine Mode. I would recommend for the purposes of this achievement to replay the first level with this cheat on as that would make it extremely easy. What this cheat does is stop any Demons you kill dropping any health or armor after they have been killed, so you need to survive with whatever placed pickups are available, though on the first mission on the easiest difficulty, with your end game powered DOOM Slayer, this is not a problem.
Next, we approach the computer where the portal is activated. There is a screen on the right with a selection of missions. Click. Next, click and select ONLY Cheat "Hunger Mode" and launch the first mission. You will have all the weapons and improvements that you made during the game. Supplies don't drop. Yes. BUT, when using a chainsaw, the cartridges FALL!
A couple of extra lives in your pocket, an easy difficulty level and in 3 minutes a trophy in your pocket.
This is almost the very end of the game.
The achievement can only be obtained in normal difficulty mode. In the "Extra Life" mode, "Level Selection" does not work, so you cannot get the achievement.
I advise you to play on the easiest difficulty and specifically on the map “Fortress of the Guardians” (mission 8).
The only enemy there is the boss in the coliseum. We run through the entire map in 5 seconds and kill the boss.