| Mission | Objective Description |
| Hell On Earth | The Slayers first goal is to eliminate the first Hell priest, who commands the demonic invasion on Earth. After that is done you must fight your way to the end of the level to the reach the portal, which transports you to the DOOM Slayers base. The Slayers base appears to be a floating castle in space, which is called the of fortress of DOOM. |
| Exultia | The Slayer must then go to a planet called Exultia to upgrade his Celestial Locator (Enemy tracker on your base), so that he can track down the position of the rest of the hell priests to stop the demonic invasion on Earth. The Slayer must receive the Locator from King Novik and then jump in a portal that leads to Hell. The DOOM Slayer does this so he can retrieve a sentinel battery from a character named the Betrayer, this battery will power up the Locator we just collected. The Betrayer also gives him a small dagger that can destroy his own sons heart, this is because his son controls the icon of sin and he hopes killing him will free his soul. |
| Cultist Base | After activating the celestial locator DOOM Guy can now see the location of the rest of the Hell Priests, the first hell priest DOOM Guy targets is located in a Cultist Base. When we arrive you must fight your way through the level to find the priest, which we soon find out is fleeing the area. You find out he has fled to another base via a transport system, you must fight through the rest of the level to make it to the transport the priest used. |
| DOOM Hunter Base | After using the transport system you arrive in a huge base filled with hordes of demons. After fighting your way 1/4 of the way through the level you find out that the Hell Priest has been re-designing the DOOM Hunter, a creature that went extinct long ago. The priest rigged the demon with a shield, a hovering sled and missiles in hopes it would kill the DOOM Slayer and protect the priest from his own fate. We are guided the way towards the end of the level by following the construction of the DOOM Hunter who is carried around the base via machines. After following the monster we arrive at the boss fight, where the Slayer destroys the DOOM Hunter that hell priest though would be his saviour, after the DOOM Hunter is killed the Hell priest is next. The Priest then meets his own fate after failing to defend himself. |
| Super Gore Nest | After killing the second Priest you return to your base for it to get hacked into by the Kahn Makyr who is the games interpretation of God, she appears in hologram form on your ship to announce that she has moved the final Hell Priest to a more secure location. After she disappears Vega (the ships artificial intelligence) announces that there has been a major increase of demonic activity on Earth, in the super Gore Nest. This is the ground zero of the demonic invasion, it is in a city consumed in disgusting tentacles and flesh like structures. Your objective for this mission is to destroy the heart of the Gore Nest and escape, after you do this the heart will explode and the Gore Nest will collapse. |
| Arc Complex | After destroying the Super Gore Nest you travel to the Arc Complex, this is where Dr. Samuel Hayden (robot) is located. This is the only person capable of tracking down the final Hell Priest. Shortly after arriving you find out Hayden’s location is barricaded by 2 giant tentacles, your goal is to find 2 turrets to shoot and destroy each tentacle to reach Samuel Hayden. After doing this you find Hayden, who appears to be torn in half. The Slayer then throws him into a portal that leads to The Fortress Of DOOM, but seconds after that you encounter the Marauder. This is a special enemy that wields an axe and shield when fighting, you only have a limited time gate to damage this enemy. But after you kill him you enter a portal to reach the Fortress Of DOOM along with Hayden. |
| Mars Core | After securing Dr. Hayden we plug him into the bases mainframe which gives him the ability to communicate with the Slayer. Hayden then tells the Slayer that the final priest is located in Sentinel Prime, which is the Kahn Makyrs home world. But the only way to access it is through a lost city in the core of Mars, through an ancient city called Tibet. To get to the core of Mars we have to access the BFG- 9000, which is a huge laser cannon that can destroy anything in it’s path. Our main objective for this mission is to make our way to the gun and shoot a hole into the surface of Mars. After that we must launch our selves into it’s centre via an escape pod, once we arrive we must fight our way through some demons and jump through a portal which leads to Sentinel Prime. |
| Sentinel Prime | Once we arrive at Sentinel Prime, we are greeted by the Kahn Makyr trying to persuade the Slayer to leave the worlds, but of course the Slayer resists her offers. After pushing further through the world we discover that the Priest is being defended by an ancient gladiator which we must destroy in order to reach the priest. After Destroying the Gladiator the last Priest is forced out of hiding to meet his fate at the hands of the DOOM Slayer. |
| Taras Nabad | After returning to the Fortress of DOOM the Kahn Makyr reveals that she will unleash the Icon Of Sin upon the Earth to destroy it, this is because The Slayer stopped the demonic consumption of Earth After killing the final Hell Priest meaning that her plans have been foiled. Hayden sends us to Taras Nabad which is a lost ancient city that is home to the crucible blade, which is the only weapon that is capable of killing the Icon Of Sin. The slayer fights his way through the lost city until we encounter a fallen titan with a crucible inside of it’s brain. He then pulls the helm out of it’s head, because if the blade is removed the Titan will rise again. Since as the blade is in the titans head The Slayer must forge a new one, so he pushes through the level to a crucible forge where he re-forges the blade of the crucible. After The Slayer has the crucible he makes his way back to the Fortress Of DOOM. |
| Nekravol Part 1 | The DOOM Slayer is now ready to defeat the Icon Of Sin, so now he has one objective which is to stop the ritual the Kahn Makyr is hosting on Urdak. The Ritual will allow them to gain control of the icon Of Sins rampage on Earth. But Urdak is not accessible directly, to get there we must travel through Nekravol. Nekravol is the city of the damned, an argent factory that harvests souls of humans for energy. DOOM Guy must slay his way through hell to defeat the Kahn Makyr and stop the ritual to resurrect the Icon Of Sin. |
| Nekravol Part 2 | After journeying through Nekravol the Slayer must dive deeper into the flow of Argent Energy and climb to the top of the factory. This is where the portal to Urdak is, put to open the portal the Slayer must destroy the chains which are held by Titans to stop anyone entering Urdak. These chains close the portal, but with the chains broken the portal will open. DOOM Guy finishes the level by jumping in the portal to Urdak. |
| Urdak | Shortly after reaching Urdak and traversing the environment the Slayer reaches the ritual chamber where we can see the Icon Of Sin. Before the ritual is complete the Slayer drives the dagger we recieved from the Betrayer in Exultia into the Titans Heart. The Titan wakes up untamed by the Makyr. The Icon Of Sin then enters a portal to Earth to wreak Havoc, so the DOOM Guy must quickly make his way back to Earth to stop the Icon Of Sin before it is too late. This is because the longer the Icon Of Sin stays on Earth the stronger he will become, eventually making him unstoppable. To do this The Slayer must kill the Kahn Makyr by reaching her location. To do this three rings have to be aligned by visiting different islands around Urdak and moving them through control panels. After all three rings are aligned the gate that leads to the Kahn Makyr is opened, The Slayer must then make way to her and kill her to open the portal to Earth. |
| Final Sin | After Killing the Kahn Makyr DOOM Slayer returns to Earth to destroy the Icon Of Sin before it destroys the Earth. To make it there DOOM Guy must navigate his way through the city torn apart by the Icon Of Sin. After destroying all demons within the Slayers path he finally meets the Icon Of Sin. They must both fight on top of a tall building, DOOM Guy must destroy all his armour and flesh to defeat him. And then he must drive a crucible blade through it’s brain to kill it permanently, once that it is done the story of DOOM Eternal is over. |