Doom Eternal is a 2020 first-person shooter video game developed by id Software and published by Bethesda Softworks.

Set some time after the events of the 2016 game, the story follows the Doom Slayer once again, on a mission to end Hell's consumption of Earth and foil the alien Khan Maykr's plans to exterminate humanity.

The Ancient Gods, a two-part standalone campaign DLC set after the events of the main game, was released between October 2020 and March 2021.

Doom Eternal received positive reviews from critics, who praised its campaign, graphics, level design, soundtrack, and combat mechanics, though some disliked the increased focus on storytelling and its platforming sections.

The game continues its predecessor's emphasis on "push-forward" combat, encouraging the player to aggressively engage enemies to acquire health, ammo, and armor.

Melee weapons such as a chainsaw, the "Crucible Blade" energy sword, the Sentinel Argent Hammer (Hellbreaker), and a retractable arm-blade called the "Doomblade" can also be used.

The arm blade provides the opportunity for a larger variety of quick and violent "glory kill" executions, which drops extra health.

The Doom Slayer's armor now includes a shoulder-mounted Equipment Launcher with the ability to lob grenades and ice bombs.

Also new to the game is the hub area, called "Fortress of Doom", which players can visit between missions, containing a number of rooms with upgrades and gear locked behind doors.

The Doom Slayer, having previously been betrayed by Dr. Samuel Hayden, returns with a satellite fortress controlled by the AI VEGA to quell the demonic invasion by killing the Hell Priests: Deags Nilox, Ranak, and Grav.

The Slayer teleports to Earth and kills Deag Nilox, but the Khan Maykr transports the two remaining priests to unknown locations.

Upon uploading Hayden's mind into the fortress, he reveals Deag Grav is hiding on Sentinel Prime; the only way to get there is a portal located in the lost city of Hebeth in Mars' core.

The Slayer travels to the Martian moon Phobos, where he uses the BFG 10000 to shoot a hole in the surface of Mars to reach Hebeth.

Found badly wounded by Sentinels sometime after Doom 64, Doomguy was brought before the Deags and forced to fight in a gladiatorial arena.

Further flashbacks reveal that during the battle of Argent D'Nur, a rogue Maykr called the Seraphim imbued Doomguy with superhuman abilities by putting him in the Divinity Machine, transforming him into the Doom Slayer.

It is revealed that the Khan Maykr had made a pact with Hell to produce Argent energy, which is created through the mass sacrifice of human souls.

[8] The Slayer enters Urdak through Hell's citadel, Nekravol, and halts the Icon's awakening ceremony by using the Betrayer's dagger to destroy its heart.

The death of the Khan Maykr and Hell's conquest of Urdak have given the demons a chance to dominate all dimensions and reinitiate their invasion of Earth.

Despite being warned that bringing the Dark Lord into physical form is irreversible, the Slayer proceeds to summon him, only to be confronted with a being who is a mirror image of him.

The Slayer goes to Argent D'nur for a Wraith Crystal to power the portal, located inside the World Spear, a massive crystalline alien ship that had landed on the planet long ago.

Being also one of the Dark Lord's creations, the Slayer falls unconscious before being sealed inside a stone sarcophagus at the Ingmore's Sanctum by the Seraphs until he is needed again.

According to Stratton, the team aimed at making a "Doom universe", featuring larger and more varied locales, including "Hell on Earth", for players to explore.

The team decided to remove the SnapMap mode and reassign its resource to develop post-launch campaign downloadable content.

[36] In May 2020, Stratton released a statement on Reddit, saying that Gordon was given extensive time to mix the tracks and repeatedly delayed progress, missed deadlines, and refused to respond to emails or phone calls.

[37] In September 2020, Andrew Hulshult announced that he and David Levy would compose music for The Ancient Gods campaign expansion.

Due to the demand expected for both games, and in light of the COVID-19 pandemic, GameStop decided to begin selling Doom Eternal one day earlier, on the 19th, to minimize crowding.

[43][44] The stark contrast in tone between both games, combined with them being released on the same day, prompted fans of both series to celebrate the coincidence by creating light-hearted crossover art featuring the Doomguy and Animal Crossing's Isabelle as "best friends".

[53][54][55] Critics praised the campaign, graphics, level design, combat, soundtrack, and improvements over its predecessor, while some disliked the increased focus on storytelling and lore, and the platforming sections.

[84] SuperData estimated that, as of March 2020, the game had sold 3 million digital copies worldwide, beating 2016's Doom's 957,000 units of launch month sales.

[86] According to former id Software employee Dave Saunders, Doom Eternal has made over $450 million in revenue in less than a year following its launch.