Doom Eternal

Doom Eternal is a sequel to Doom (2016), announced by Bethesda and id Software at the BE3 presentation on. Further information, including a gameplay reveal, was released at the 2018 QuakeCon convention keynote presentation on August 10. Previously planned for release on November 22, 2019, in October of that year the game was delayed until its eventual release on March 20, 2020 for PC, Xbox One, and PlayStation 4. It was announced on March 19, 2019, that Doom Eternal will also support the game streaming service. While originally slated for a simultaneous release on the Nintendo Switch, as of the October delay it was stated that the Switch version will release at a later date which still remains unspecified.

Story
Set 8 months after Doom 2016, about 60% of the Earth has been conquered by the demonic invasion. With the Earth military helpless in turning the tide of the battle and the majority of the human population killed during the first month of the invasion, star ships called ARCs are created to preserve humanity and evacuate them into orbit.

It is at this time that the Doom Slayer returns from Hell to save humanity by slaying the three treacherous Hell priests, whom the Khan Maykr has sent to Earth to command the invaders and carry out the ritual that would plunge the Earth entirely into Hell.

After the Slayer kills all the Hell priests, the Khan Maykr decides to resurrect the Icon of Sin to ensure the sacrifice of the Earth is not stopped. The Slayer goes to get his Crucible blade and kills the Khan Maykr and the Icon, forcing the demonic army to retreat. As the Earth marvels at its salvation, the Slayer departs to continue his endless fight against Hell.

Details
According to id Software's Marty Stratton and Hugo Martin, the game features an even more powerful Doom Slayer taking on twice as many types of demons, with portions of the game set on Earth, Phobos, Mars, and Hell. Among his new abilities, the Doom Slayer can execute a short-range dash up to twice in a row, even in mid-air, swing from poles and climb and jump between specially marked walls in a manner reminiscent of the  series. Special orbs bearing the Slayer's mark are like the previous game's runes, but they give rune powers without challenges..

Mick Gordon is returning as the composer of the game's soundtrack, and has confirmed that the formula used in the previous game will be iterated upon for the sequel. It is confirmed that songs from previous games in the series will again be sampled.

It has been confirmed by id Software in a QuakeCon questions-and-answers session that SnapMap will not return. However, a single-player pack is believed to be in the equation instead.

The game will utilize the next iteration of the id Tech engine, id Tech 7. While no concrete details have been revealed, id Software has claimed "ten times the geometric detail and greater texture fidelity." Early analysis of the gameplay footage reveals no dramatic visual changes from Doom 2016, but may have been added to the engine, allowing architecture close to the player to be adaptively tessellated, making it appear higher-fidelity.

Bethesda announced that the game will launch on the Steam platform for PC in a tweet posted on March 25th, 2019, putting to rest speculation that the game might be held as an exclusive for the Bethesda.net store.

At QuakeCon 2019, id Software revealed that the game, instead of Doomguy collectibles, will feature collectibles for all of the demons, which will also become available as action figures.

Standard
The standard edition is a box with a disc for Xbox One or PlayStation 4, or a Bethesda.net key for PC. This edition is also available on Steam as a digital download.

Deluxe Edition
The Deluxe Edition adds the digital subset of bonuses also available in the Collector's Edition: This edition is also available on Steam as a digital download.
 * Year One Pass, with access to the first two campaign DLCs, slated to be released within the game's first year.
 * Demonic Slayer skin
 * Classic weapons sound pack

Collector's Edition
On June 9, 2019, Bethesda announced the Collector's Edition for Doom Eternal, including: Digital content includes the three bonus items also included with the Deluxe Edition. Physical PC editions include a Bethesda.net key.
 * Wearable replica of the Doom Slayer helmet
 * Playable cassette tape with the Doom (2016) and Doom Eternal soundtracks
 * Steelbook case
 * Lore book
 * "The Gift of Argent" lithograph

Rip and Tear Pack
Pre-orders of any edition add the following content via the Rip and Tear Pack:
 * Digital download of Doom 64 for the matching system
 * Doot revenant skin
 * Throwback shotgun weapon skin
 * Cultist Base bonus campaign master level

Vendor-specific bonuses

 * Best Buy is offering an exclusive Doom Eternal Scanavo steelbook case with pre-orders of any edition of the game.
 * GameStop offered a tin mini lunchbox for pre-orders.

Ambient

 * Buff totem: These structures do not attack on their own, but continuously summon and buff other monsters until pulled out of the ground with a melee attack.
 * Cueball: Is the new version of the Possessed engineer, no longer attacks the player, instead is an utility demon, the Slayer can punch him in any direction without staggering him to injure other demons.
 * Tentacle: These tentacles sometimes appear from holes in the ground. They are easily destroyed with the chaingun.

Fodder

 * Gargoyle: Imp-like enemies with an acid barrage attack and limited flight capabilities.
 * Imp: Imps are now more muscular and sport spikes on their bodies. They also have brightly glowing red eyes.
 * Lost soul
 * Maykr drone: Automatons that serve the Maykrs. Surprisingly well armored for a fodder enemy, but drops many resources when slain with a headshot.
 * Mecha zombie: More aggressive variety of the standard zombie enemies equipped with a flamethrower.
 * Soldier (Blaster): Functionally identical to the possessed soldiers from Doom (2016). Now closely resemble zombiemen from Doom and Doom II.
 * Soldier (Shield): Functionally similar to the possessed security from Doom (2016). Now closely resembles the shotgun guy from Doom and Doom II.
 * Zombie: Has multiple skins which depend on the level, two of which resemble the the possessed and unwilling enemies from Doom (2016).

Heavy

 * Arachnotron: Miniature versions of the spider mastermind that attack with a plasma turret. They can sometimes climb up walls and ceilings.
 * Cacodemon: Their appearance has been slightly modified, and they now bleed blue. They now have a long-range bite, and can spew fireballs in quick procession.
 * Carcass: An advanced cybernetic zombie able to project a shield that protects other monsters.
 * Cyber-mancubus: Now able to attack with flamethrowers, like its standard counterpart.
 * Dread knight: A cybernetically enhanced Hell knight that can attack from long range.
 * Hell knight: Largely identical to its 2016 incarnation.
 * Mancubus: Now closely resembles its Doom II incarnation.
 * Pain elemental: Can spawn lost souls, and will throw them like grenades to attack.
 * Pinky: Largely identical to its 2016 incarnation.
 * Prowler: Now occurs as a monster in single-player mode.
 * Revenant: Can now fire a barrage of homing missiles similar to its Doom II incarnation.
 * Spectre
 * Whiplash: A female serpentine demon that attacks with whips.

Super Heavy

 * Arch-vile: Replaces the summoner.
 * Baron of Hell: The baron now possesses a solid gray palette and wields fire swords. Now has a flaming skeletal frame underneath its skin instead of an organic body like most other enemies.
 * Doom hunter
 * Marauder
 * Tyrant: A new iteration in the class of cyberdemons, which now closely resembles its Doom incarnation. Occurs as an advanced standard enemy rather than a boss.

Bosses

 * Gladiator
 * Icon of Sin: Previously present as an Easter egg, it will now appear as a boss in its unarmored and armored forms. Its new armor is based on Maykr technology.
 * Khan Maykr

Other

 * Kalibas

Gigantic demons have been shown, one resembling a scaled-down Titan (referred to in IGN First gameplay as "Hell Barge") and the other remaining mostly unseen aside from its forearm. Judging by the size of the forearm, the second demon is apparently as large as a tall building. The second, bearing armor, has been confirmed to be the Icon of Sin. The Hell Barges are enslaved Titans carrying the Hell Priests' temples. Titans also appear prominently in Exultia (multiple dead bodies), Taras Nabad (dead, from it the player retrieves the Crucible handle) and Nekravol levels (the first in a cutscene showing the Soul Factory tower, presumably being tortured, and other two hold the chains on which the Argent-transmitting mechanism is suspended) The Titans, sans Icon of Sin, appear only as environmental elements, not as actual enemies.

Mechanics
A new dynamic model damage system called "destructible demons" is introduced in the game, allowing monsters to actively reflect the amount and types of damage they have taken. This system has tactical advantages as well, as it allows players to destroy some enemies' weapons to disable certain enemy attacks.

Mobility has been expanded; a new dash ability has been added, as well as wall-climbing and swinging on monkey bars found throughout the environment. You can dash twice (even in midair) before needing to recharge, and there are dash recharge items in the environment. The super shotgun also features a "meathook" that allows the Doom Slayer to grapple onto an enemy and pull themselves towards it. With the increased movement options, traversal sections have become more complex, incorporating various hazards such as flaming chains, falling platforms and damaging fields. Unlike the previous game, falling in these sections will instantly return the player to their last position at the cost of a few points of health.

The Slayer also has a new "blood punch" ability, a very powerful melee attack that damages enemies in a wide arc. This attack is charged by glory killing 2 demons.

Occasionally an "empowered demon" may appear in a player's single-player campaign, bearing the name of a player that was killed by that demon in their own play session. Such demons are stronger than normal, but give special rewards when defeated. Empowered demons are strictly optional. Though demonstrated before release, and available as an option in the menu, the empowered demons feature is not yet live as of April 2020.

Also, the Doom Slayer now has a personal headquarters called The Fortress of Doom, a castle-like space station orbiting the Earth which serves as an in-game hub. Sentinel Batteries are scattered across the game and can be collected to bring the Fortress online, unlocking more areas to explore. Another feature of the Fortress is the 'Ripatorium', a demon prison that functions as a training ground.

Weapon points, rune perks and suit upgrades all make a return, containing a mixture of familiar and new upgrades. Sentinel crystals replace Argent cells as the method for upgrading the player's health, armor and ammo.

Secret encounters and Slayer gates are optional combat encounters in each level. Slayer gates are unique in that they are comparatively intense encounters that can only be accessed by finding secret keys hidden in the maps.

Due to the increased difficulty from the previous game, extra life powerups can be found scattered across the game. These will allow the Doom Slayer to immediately respawn if killed instead of being sent back to the last checkpoint.

The Codex returns from the previous game, but now has the added feature of listing enemy weaknesses. Instead of datapads, lore is scattered across the game world in the forming of floating burned pages.

Weapons

 * Melee attacks have the Doom Slayer punching his opponents instead of bludgeoning them using his currently held weapon. Glory killing enemies fuels his "Blood Punch", a supercharged punch that deals damage in an area in front of the player.
 * Ballista, which appears similar in function to the original Gauss cannon, but with a new explosive bolt and "destroyer blade" mods.
 * BFG-9000, which is now a part of the weapon wheel. It now uses 30 ammo per shot and gets 30 ammo per pickup, instead of the previous 1 ammo per shot and per pickup. The new ammo count is intend for Unmaykr, which uses 1 ammo per shot.
 * Chainsaw, seemingly identical to its 2016 version. It is referred to as the Mixom "Dopesaw", versus the previous game's "Painsaw".
 * Chaingun, which now fires energy projectiles similar to the previous game's pistol, but shares its ammo pool with the heavy cannon. The Gatling rotator mod has been replaced with a shield, as it no longer needs to wind up before firing.
 * Combat shotgun, with the original Charged Burst replaced with an automatic fire mod, and the explosive shot being replaced with a sticky bomb.
 * Crucible - Used to instantly glory kill enemies. Functions in a similar manner to the chainsaw, but every enemy type costs one charge and slain enemies drop health instead of ammo. The Crucible carries three charges. It is a distinct artifact from the Demon Crucible retrieved in Doom (2016).
 * The Doomblade, an arm-mounted retractable blade used in glory kills.
 * Flame belch, a shoulder-mounted napalm-firing alternate weapon that sets enemies ablaze. Burning enemies drop armor shards.
 * Ice bomb, a projectile fired from the shoulder which freezes enemies temporarily.
 * Frag grenade, a shoulder-mounted alternate weapon which replaces the hand-tossed frag grenade of the previous game.
 * Heavy cannon, with a scope and a micro-missile mod, similar to the original heavy assault rifle.
 * Plasma rifle, with a new appearance inspired by the classic plasma rifle and with the Stun Bomb mod replaced by a Microwave Beam mod which slows down and damages enemies, making them explode with splash damage if killed.
 * Rocket launcher, with new demonic appearance and a returning Remote Detonation mod.
 * Super shotgun, which now includes an underslung hookshot-like device currently known as the "meat hook" which is used to grapple onto enemies from afar.
 * The Unmaykr, a secret weapon which requires six Empyrean Keys to be used in the Fortress of Doom. A Maykr automatic weapon powered by BFG cells.

A pistol was also fully implemented into the game, but is normally unobtainable. It can only be obtained by using a console command which is normally unavailable.

Missions

 * Hell on Earth
 * Exultia
 * Cultist Base
 * Doom Hunter Base (Three Doom Hunters are minibosses.)
 * Super Gore Nest
 * ARC Complex (The Marauder is miniboss.)
 * Mars Core
 * Sentinel Prime (The Gladiator is boss.)
 * Taras Nabad
 * Nekravol
 * Nekravol - Part II
 * Urdak (The Khan Maykr is boss.)
 * Final Sin (The Icon of Sin is boss.)

Multiplayer
A new multiplayer feature called "Demon Invasion" (also referred to as "Slayer hunting parties") will be available, allowing players to go on raids into other players' campaigns to play as demons in a manner similar to the first game's demon rune. Participation is strictly optional. The launch of Invasion mode was delayed to the post-release period as of October 2019.

While it was stated at QuakeCon 2018 that traditional multiplayer would be included as well, this time being developed in-house at id Software, it was later explained that ordinary modes such as deathmatch are not currently planned for inclusion. According to the E3 2019 announcement, there will instead be a "Battlemode", where one player controlling the Doom Slayer fights two demons controlled by other players, who can also summon weaker AI-controlled demons such as former humans and drop hazards. The playable demons are the revenant, mancubus, marauder, pain elemental, and arch-vile.

Trivia

 * Both Doom and Doom II are fully playable in-game via a classic 1990's era PC found in the Slayer's abode in the Fortress of Doom. Powering this are copies of the PSN version of DOOM.WAD and the Bethesda.net version of DOOM2.WAD which are included under the game's install directory, in . The Steam release of Doom Eternal initially omitted these files by mistake which resulted in a crash if the player attempted to play them; this was addressed shortly after launch.