Tenebris Somnia Good Ending Guide: How to Unlock Solve Et Coagula

What the Tenebris Somnia Good Ending Actually Asks of You

The Tenebris Somnia good ending comes down to one decision you make near the end of the game: whether you use the Aurifer Knife on the Relicta ghosts. Miss that detail and you can finish the story on the bad-ending route without ever realizing what you skipped. This guide walks through the exact steps for unlocking the Tenebris Somnia good ending, explains which boss awaits you at the end, and shows how to see both main outcomes without replaying the entire game.

Tenebris Somnia is a horror adventure from developer Saibot Studios and Andrés Borghi, published by New Blood Interactive and available on Tenebris Somnia's Steam page. It is not a long game, but the ending system rewards players who pay attention to how they treat the ghosts in the final stretch.

The One Rule Behind the Good Ending

According to Destructoid's ending breakdown, the game's two baseline outcomes are Solve Et Coagula, the good ending, and Magnum Opus, the bad ending. Both can be reached on a first run, which is why so many players stumble into one or the other by accident.

The trigger is entirely weapon-based. Once you pick up the Aurifer Knife, the Relicta ghosts start behaving differently — they actively try to avoid you because they are afraid of the blade. That fear is a gift, not a threat.

• Good ending route: Hold the Aurifer Knife and never use it on a Relicta ghost.
• Bad ending route: Kill at least one Relicta ghost with the Aurifer. The count does not matter beyond the first kill.

NoobFeed's guide is blunt about the margin for error: killing even a single Relicta locks you out of Ending 1 for that playthrough. There is no hidden forgiveness mechanic mentioned in any source, so treat every ghost encounter on the final route as a no-contact zone.

How to Get the Tenebris Somnia Good Ending, Step by Step

The sequence below follows NoobFeed's route guide and Destructoid's ending requirements. Each step assumes you are already deep into the story and approaching the finale.

1. Reach the final Desiderium section and take the Aurifer Knife

Progress the main story until the last Desiderium stretch, where the Aurifer Knife is handed to you. This weapon is the switch that determines both your final boss and your ending, so the moment you pick it up is the moment the fork in the road opens.

2. Save immediately — in a separate slot

Create a manual save right after the knife is in your inventory. Do not overwrite it. This single save file is what lets you collect the good ending and the bad ending back to back later, and it is the fastest recovery point if you accidentally stab a ghost.

3. Spare every Relicta ghost on the way out

Walk past every Relicta you meet. They will usually retreat once they register the Aurifer Knife, which makes a clean run easier than it sounds. Do not swing at them for fun, do not test the hitbox, and do not clear them out "just in case." Any kill permanently shifts that save onto the bad-ending path.

4. Route back to the Septimo Arte building

After the ghost encounters, work your way back through the Hotel doors to the Studio Lobby, then follow this path:

• Exit the Studio Lobby and return to the apartment building hallway.
• Take the rightmost door to reach the staircase.
• Climb to the third floor.
• Head all the way left through the third-floor apartment hallway.
• Pass through the door with water leaking underneath it.
• Continue left along the street until you reach the Septimo Arte building.
• Enter the building to trigger the final encounter.

Keep avoiding Relicta ghosts the whole way. The route back is not a combat gauntlet — it is a patience test.

5. Defeat Lacuna

If every Relicta was spared, Lacuna is your final boss. Beat Lacuna to roll credits and unlock Ending 1, Solve Et Coagula. If you fought a different final boss, that is your confirmation that a ghost died somewhere along the line.

Tenebris Somnia Good Ending vs. Bad Ending

The two main outcomes mirror each other almost exactly, which makes the comparison a useful sanity check before you commit to a route.

Everything else — the exploration, the puzzles, the walk back to the Septimo Arte building — stays largely the same. According to NoobFeed, this single choice is what determines which final boss you face and which ending you receive, not a hidden morality meter or a puzzle solution.

How to Get Both Main Endings in One Playthrough

You do not need a full second run to collect the Tenebris Somnia good ending and its counterpart. NoobFeed confirms both main endings can be earned in a single playthrough using the save you made earlier.

1. Reload the manual save you created right after picking up the Aurifer Knife.
2. Finish the game without killing any Relicta to bank Solve Et Coagula.
3. Reload that same save again.
4. Kill at least one Relicta ghost with the Aurifer Knife, then finish the run to bank Magnum Opus.

The main risk is overwriting the checkpoint by habit. If you use a single rotating autosave, back out and create a dedicated manual slot before the ghost encounters begin.

Where the Other Two Endings Fit In

Destructoid's full ending list confirms Tenebris Somnia has four endings in total. The good ending is not just an optional branch — it is a prerequisite for the advanced content.

• Vivus Ex Mortibus (Ending 3): Requires both main endings cleared and a fresh new game. Grab the Bible from the desk, use it on the second floor of the apartment, start on the Man/Mars symbol and run counterclockwise six times before solving the TV puzzle. Then use the Bible on the first floor of the Community Center, enter 6666 into the lock without opening it any other way, use the Bible again behind the green door on Floor 0, connect the yellow RCA cable to the camera and cycle channels until enemies spawn (before the Copper Key door), then take the blue door left of the elevator on the third floor, insert three Iron Crosses, and go through.
• Renuntiatio (Ending 4): Use the Apartment keys on the door. This also requires the first two endings to be unlocked first.

In other words, the Tenebris Somnia good ending route is the gateway. Skipping it locks you out of half the ending list until you go back and do a clean pass.

Practical Tips Before You Commit

• Save before the point of no return. NoobFeed specifically recommends saving right after the Aurifer pickup, and it is the single most useful habit for ending hunting.
• Treat the knife as camouflage. The Relicta fear response is what makes the pacifist run practical. Walk with confidence and they will move.
• Do not experiment with the knife mid-route. There is no undo beyond reloading. If you slip, reload the manual save rather than finishing a compromised run.
• Watch your final boss. Lacuna means you stayed clean; anything else means at least one ghost died.

FAQ

Can you still get the Tenebris Somnia good ending if you kill a Relicta ghost? No. Killing even one Relicta with the Aurifer Knife locks that playthrough onto the bad-ending route. Reload an earlier save if it happens.

Which boss do you fight for the good ending? Lacuna. Sparing every Relicta ghost sets your final encounter to Lacuna, and defeating it unlocks Ending 1, Solve Et Coagula.

Can you unlock both main endings in one playthrough? Yes. Save right after obtaining the Aurifer Knife, finish the game without killing any Relicta, then reload that save and kill at least one Relicta to claim Magnum Opus.

Do you need the good ending to see the secret endings? Yes. Both Vivus Ex Mortibus and Renuntiatio require the first two endings — Solve Et Coagula and Magnum Opus — to be completed before they become available.