Players report that killing zombies in certain rooms lets you collect hearts. Gather three, bring them to the Gun Ascension altar (violet lamp over the door) and offer them. That opens the Mother’s boss room. Players
The Steam page confirms only that a hidden ritual wakes the Mother. Official The exact trigger rooms and the boss mechanics are not officially documented.
What is confirmed
- There is a hidden ritual that wakes the Mother, described on the official store page. Official
- The game has special enemies and boss fights. Official
- The October 20, 2026 demo patch added “a few hidden content things” the developer chose not to reveal, preferring they be “found naturally.” Dev
- In the demo, a run ends at round 25 or when you reach the Easter egg / first boss. Press Press
The hearts route (player-reported)
This route comes from a player answer in the official Steam discussions (originally in Chinese, translated here). We have not seen it confirmed by Hamuno. Treat specifics as provisional for the current demo build.
- Open the map and turn on the powerNot proven to be required, but you will need points, a real gun and access to the wider map anyway. The power room sits behind the door with a red lamp. Players See how to turn on the power.
- Locate the Gun Ascension roomIts door has a violet/purple lamp. Players Remember the route back — the layout is new every run.
- Collect hearts from zombies in certain roomsThe report says that in some rooms, after killing zombies, you can collect a heart. Players Which rooms qualify is not documented; clear rooms methodically and watch for a pickup.
- Collect three heartsThree is the number given in the report. Players
- Offer them at the Ascension altarThe same altar you use to upgrade guns. Players
- Enter the Mother’s roomThe offering is said to open access to the Mother boss room (“BOSS母體房”). Players Fight prepared — see below.
How to prepare for the Mother
No one has published boss numbers we can verify, so this is general preparation that follows from the confirmed systems:
- Ascend your main gun first. The altar can be used repeatedly as long as you can afford it. Official Since the hearts go to the same altar, you’ll be there anyway.
- Pick sustain in the draft. After every round you draft one upgrade Official; players mention picks like extra ammo and headshot damage on strong guns. Players See upgrades.
- Buy perks before the attempt. Perk machines are scattered around the map. Official
- In co-op, assign roles. One player scouts rooms for hearts while others hold the horde. Doors you buy open for everyone. Press
- Watch the round count in the demo. The run ends at round 25, so don’t leave the attempt too late.
Still unknown
| Question | Status |
|---|---|
| Which rooms drop hearts | Not documented Unknown |
| Whether power must be on first | Not documented Unknown |
| The Mother’s attacks, phases and reward | Not documented Unknown |
| Whether the full game changes the ritual | Not announced Unknown |
| The rest of the hidden content added Oct 20 | Developer won’t reveal Dev |
We will update this page when the developer or reproducible gameplay confirms more. We do not publish guessed numbers.
Easter eggs on Workshop maps
Custom maps built in the demo’s editor can hide their own Easter eggs — one creator’s office-themed map asks “Can you find the easter egg?” Official Those are separate from the official Mother ritual. See the map editor guide.
FAQ
How many hearts do you need for the Mortuus Easter egg?
Three, according to the player report that first described the route in the official Steam discussions. The developer has not published official steps.
Where do you put the hearts in Mortuus?
Players report offering them at the Gun Ascension altar — the room marked by a violet/purple lamp over its door. Doing so is said to open the Mother’s boss room.
Does finishing the Easter egg end the demo?
Coverage of the demo says a run ends at round 25 or when you reach the Easter egg / first boss. The full game has no round cap planned.
Is the Easter egg in the same place every run?
No fixed location exists because the map is procedurally generated each run. Use the door lamps (red = power, violet = Ascension) to orient yourself.
Sources
Labels: Official store page or pinned post · Dev developer statement · Players community report, not confirmed by the developer · Press coverage.
- Official Mortuus — Steam store page (app 3680170) — 2026-10-29
- Players Community thread: "通關方式" (how to clear the demo) — 2026-10
- Dev Steam announcement: "DEMO Optimization Patch" — 2026-10-20
- Players Community thread: "Took 1 hour to find the first generator room" — 2026-10-24
- Press MeinMMO — Steam Next Fest October 2026 top 10 (German) — 2026-10
- Press gaming-st.com — Mortuus demo guide: Japanese, co-op, PC specs (Japanese) — 2026-10
- Official Pinned "Workshop Maps | Share Your Creations" — Steam discussions — 2026-10-21
- Players Community thread: "the subjectively best weapon" — 2026-10-28
Spotted something outdated? Mortuus is still in development; values can change between demo patches and the full release. See how we source.