Full list of all 50 DOOM Eternal achievements worth 1,545 gamerscore. It takes around 25-30 hours to unlock all of the achievements in the base game.
The base game contains 33 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 17 achievements worth 545 Gamerscore.
Kill 200 opponents in BATTLEMODE
Heal yourself or your teammate for 50000 health in BATTLEMODE
Complete Extra Life Mode with 10 Extra Lives in your Inventory
Master all Weapon Mods in a single save slot
Kill a Player Demon with each of the 8 Slayer weapons in BATTLEMODE
Complete a Mission with only the Famine Mode cheat on
Complete the toy collection in a single save slot
Complete the cheat code collection in a single save slot
Complete the album collection in a single save slot
Beat all encounters and Mission Challenges, and find all Items in Taras Nabad in a single save slot
Play 25 BATTLEMODE matches
Play as 5 different Player Demons in BATTLEMODE
Do 5000 damage as a Player Demon in BATTLEMODE
Collect all physical Codex pages in a single save slot
Acquire the Unmaykr
Complete all Slayer Gates in a single save slot
Purchase all Praetor Suit Perks in a single save slot
Kill the Icon of Sin
Complete the Campaign on any difficulty
Kill the Khan Maykr
Acquire a new Crucible in Taras Nabad
Fully upgrade Health, Armor, or Ammo in a single save slot
Best the Gladiator in the coliseum
Blow a hole in Mars
Spend 8 Sentinel Batteries in the Fortress of Doom in a single save slot
Complete a Praetor Suit Perk category in a single save slot
Pick up 20 Extra Lives Total in a single save slot
Kill the Doom Hunters
Kill 666 Demons (excluding Player Demons and Wolves)
Complete a Slayer Gate
Perform 33 Unique Glory Kills in a single save slot
Upgrade Health, Armor, or Ammo
Complete Hell on Earth
Complete Extra Life Mode with 5 Extra Lives in your Inventory (Ancient Gods 1)
Defeat Samur in the Holt (Ancient Gods 1)
Collect all physical Codex pages in a single save slot (Ancient Gods 1)
Complete all Secret Encounters in a single save slot (Ancient Gods 1)
Acquire all Support Runes in a single save slot (Ancient Gods 1)
Destroy the Life Sphere in the Blood Swamps (Ancient Gods 1)
Complete the UAC Atlantica Facility (Ancient Gods 1)
Complete the first Horde Mode Mission
Re-collect all of the weapons on the Weapon Wheel
Beat Horde Mode
Complete Extra Life Mode with 5 Extra Lives in your Inventory (Ancient Gods 2)
Kill the Dark Lord (Ancient Gods 2)
Complete Immora (Ancient Gods 2)
Collect all physical Codex pages in a single save slot (Ancient Gods 2)
Acquire all Sentinel Hammer upgrades (Ancient Gods 2)
Complete Reclaimed Earth (Ancient Gods 2)
Complete World Spear (Ancient Gods 2)