These are source-based route checklists paraphrased from Snilloc’s Steam community walkthrough, checked 24 October 2026. They explain the progression and common blockers; puzzle symbols or target values can vary. The official story trailer attached to this page is promotional footage, not a walkthrough.
Before the hidden route: finish the main quest
Complete the normal map story, then interact with the God Killer machine. Find The Stranger at the machine and three further appearances, using the radio sound to locate him. Do this shared opening before the map-specific steps below. A normal boss kill alone does not award its hidden-objective achievement.
Lavernock: Silence of the Lamb
- At the Old Library, activate the Medusa statue and survive the enemy sequence.
- Read the four rat groups and their associated symbols. In the Catacombs, place the symbols in the order established by the rat counts; do not copy a supposedly universal code.
- Use Thunderbolt to charge the five generators: Catacombs, Facility Entrance, second-floor balcony, Cavern and Laboratory. Recheck every location if progression stalls.
- Escort the black sheep, enter the opened secret room and collect the seal. Place it in the boss room, then complete the additional Abraham encounter.
Ashes: Ashes to Ashes
- Remove the Basement Cells barrier. Find the purple door on the left and escort the black sheep to the chapel.
- In the Void, use the four red buttons and clear the enemy sequence including King of the Rats.
- In the Labyrinth, draw Killer Watt’s electrical attacks into the three fuse boxes. Simply killing it before charging them will not finish this puzzle.
- Read the four rat piles upstairs in the Library and use their order to shoot the corresponding heads. Return to Basement Cells for the seal.
- Take the seal to the Great Hall and complete the extra Isaac fight.
Sewers: What’s Dead Should Stay Dead
- Use the First Class Coach seal interaction to begin the additional Balor encounter.
- Turn the cat statues at Tower Clearing, the Second Coach entrance, Sewer Entrance West and Station until the Bar Coach button symbols illuminate.
- Return to the Bar Coach button and defeat the next Balor encounter. Then find the black sheep at spawn and complete its escort.
- Return to First Class Coach for the next Balor stage and the seal. Place the seal in Stranger’s Land and finish the hidden finale; do not assume the earlier normal Stranger fight is the last step.
Fortress: Secret Lover
- Open the purple box in Dungeon Hallway and escort the black sheep to The Factory. Complete the Abraham and Isaac encounters.
- Return to the Bio-Pod near spawn. Use Shattered Edge to strike the five hanging corpses in Outer Court.
- Interact with the Bio-Pod again and clear the King of the Rats and Balor encounters.
- At the Dungeon entrance, use the purple lantern on the left. Read the four cell symbols in cell-number order, then enter that sequence in Dungeon Laboratory.
- Collect the seal, place it in Lover’s Chamber and finish the hidden boss sequence. This additional finale is distinct from the normal Elisabeth/Thomas clear.
Seals, achievements and the God Killer purchase
| Map | Hidden achievement | Normal boss before continuation |
|---|---|---|
| Lavernock | Silence of the Lamb | Abraham |
| Ashes | Ashes to Ashes | Isaac |
| Sewers | What’s Dead Should Stay Dead | The Stranger |
| Fortress | Secret Lover | Elisabeth and Thomas |
After earning all four original seals, community weapon documentation lists God Killer purchase access for 3,500 after the relevant boss. The four-seal unlock is persistent progression; it is not the same as carrying four items through a single match. Use the complete achievement checklist to distinguish hidden, Nightmare and music conditions.
House, Tides and the anniversary Egg
House of the Damned and Tides of Terror have their own hidden stories, seals and music. They are not extra prerequisites for the original four-seal God Killer unlock. The official anniversary update separately introduced a global Nightmare quest involving Demon Lamb and Y Cracen with The Egg mask as its reward. That announcement does not supply a full step-by-step solution; this page does not invent one.
Official game video
Watch the official video on YouTube: Sker Ritual | Official Story Trailer
Questions people ask
How do you unlock God Killer?
Complete the four original-map hidden objectives to earn the Lavernock, Ashes, Sewers and Fortress seals. Community documentation then lists God Killer for 3,500 after the relevant map boss. It fires explosive orbs; it is not a melee weapon. House and Tides have their own seals, separate from these four prerequisites.
When do the hidden objectives begin?
Continue after the normal main quest, interact with the God Killer machine and find The Stranger four times: near the machine and at three further locations. Listen for radio audio. This shared opening is followed by the map-specific sequence below.
Is The Egg the same quest?
No. The 24 April 2025 anniversary update describes a separate global Nightmare quest with Demon Lamb and Y Cracen, rewarding The Egg mask. The original four God Killer seals and the later maps’ own secrets are distinct objectives.
Sources checked 2026-10-24
- Community God Killer unlock and weapon article — accessed 2026-10-24
- Community four-map hidden objective walkthrough — accessed 2026-10-24
- Official anniversary Egg objective — accessed 2026-10-24
- Official achievement names and conditions — accessed 2026-10-24
Last source check: 2026-10-24.