Tenebris Somnia Ending 4: How to Unlock Renuntiatio and All Other Endings

What Counts as Tenebris Somnia Ending 4?

Reaching Tenebris Somnia ending 4 is the last box most players tick, and it is the one the game explains least. The horror adventure splits its finale into four separate outcomes, and the two hidden ones stay sealed until you have already finished a normal run or two. One playthrough can never show you the whole ladder, which is exactly why so many players finish the credits and still wonder what they missed.

Tenebris Somnia ending 4 is called Renuntiatio, and published guide coverage ties it to using the Apartment key at the building’s front entrance. Before you can reach it, though, you need the full picture, because this game gates its secret finales behind completed runs rather than a single last-minute decision.

If you want to check the game's own store page while you plan your runs, start with Tenebris Somnia on Steam.

The Four Tenebris Somnia Endings at a Glance

The numbering below follows the order used in walkthrough and ending coverage: the Lacuna fight is treated as Ending #1, the Hermes fight as Ending #2, and Renuntiatio as the fourth ending.

The first two endings are decided in the final stretch of the game. Once you hold the Aurifer, the Relicta Ghosts stop attacking and start fleeing. Strike even one of them down and you are locked into Magnum Opus and the Hermes fight. Spare all of them and you get the good ending, which means fighting Lacuna without the Aurifer in hand.

What You Need Before Chasing Tenebris Somnia Ending 4

Ending 3 runs through the late-game weapon chain, so build the Aurifer before you attempt it. Renuntiatio is different: it is triggered from the front entrance of the building on a fresh playthrough, so the weapon chain below is preparation for Vivus Ex Mortibus only.

• Grab the Lapis Fictus Knife. Solve the photograph-and-poem puzzle in Ivan's third-floor study, chase down both figurines, and use the resulting Memento on the statue in the A.S. Production Studio to create Auritsatio, then claim the knife.
• Forge the Melanosis Knife. Use the Lapis Fictus Knife next to the kitchen fuse box in Ivan's building. The power goes out, which is intended.
• Forge the Viridis Knife. Climb down the open elevator shaft on Floor 2, escape the Relicta Ghosts in the passage below, and quench the blade in the mercury puddle near the TV.
• Forge the Aurifer. Use the Lead Key in the hotel area, work your way to the save point near the symbol-marked door, and bathe the Viridis blade in moonlight.

Once the Aurifer is complete, save before you walk back out into the hotel hallway. That single save point is where the good and bad endings diverge, and it is the most efficient place to branch from if you are working toward the two starter endings that unlock the hidden routes.

How to Unlock Renuntiatio, Tenebris Somnia Ending 4

Here is the short version: the published instructions for this finale are brief but specific. NoobFeed's dedicated Renuntiatio guide states that you must finish Endings 1 and 2 first, start a new playthrough, and use the Apartment Key on the building's front entrance.

So the confirmed requirements are:

1. Complete Solve Et Coagula by sparing every Relicta Ghost and beating Lacuna.
2. Complete Magnum Opus by killing at least one Relicta Ghost and beating Hermes.
3. Start a new playthrough once both endings are logged.
4. Use the Apartment Key on the building's main door at the ground-floor front entrance.

Julia leaves the building as soon as the key is used, so the ending triggers immediately and there is no boss fight on this route.

What the Front-Entrance Route Does Not Need

Renuntiatio bypasses the late-game weapon chain entirely. You do not need the Aurifer, the purified key, the Septimo Arte finale, or any boss encounter for this route, so do not spend a run working toward them first. The only prerequisites are the two starter endings and the Apartment Key in a fresh playthrough.

The Rerun Ritual: How Vivus Ex Mortibus Fits In

The third ending, Vivus Ex Mortibus, is the one players most often mix up with Tenebris Somnia ending 4. It demands a new game plus a sequence of Bible interactions, and each step has a hard timing window.

Ending 3 is not listed as a prerequisite for Renuntiatio, but both hidden routes share the same rerun structure, so the ritual above is a useful rehearsal for how this game hides its optional content.

Mistakes That Stall Your Ending Progress

• Killing a fleeing Relicta Ghost by accident. One swing with the Aurifer flips you to the bad ending permanently for that save. If you want the good ending, holster the knife around ghosts.
• Opening the 6666 lock with anything else. The Vivus Ex Mortibus guide is explicit that the lock must be opened with the Bible code.
• Doing ritual steps out of order. The TV puzzle and the Copper Key door are both hard cutoffs; once you pass them, that run's hidden-ending attempt is dead.
• Fighting Lacuna with an empty inventory. The good-ending boss strips the Aurifer from you, so bring shotgun and revolver ammo.
• Expecting Tenebris Somnia ending 4 on a fresh file. The unlock check wants the first two endings already completed.

FAQ

How many endings does Tenebris Somnia have? Four: Solve Et Coagula, Magnum Opus, Vivus Ex Mortibus, and Renuntiatio. The first two are available on an initial run; the last two require completed playthroughs.

Is Tenebris Somnia ending 4 missable on a first playthrough? Yes. Renuntiatio requires the first two endings to be unlocked first, so it cannot trigger on your very first run no matter which choices you make at the finale.

How do you actually trigger the fourth ending? Finish Solve Et Coagula and Magnum Opus, start a new game, then use the Apartment Key on the building's front entrance in the ground-floor lobby. That immediately triggers Renuntiatio.

Does killing a Relicta Ghost ruin my chance at the best ending? It locks that save into Magnum Opus. The ghosts only flee once you carry the Aurifer, so the choice is telegraphed clearly — spare them all if you are aiming for Solve Et Coagula.