Start the released PC game; choose your spoiler level
Tenebris Somnia is the single-player survival-horror game by Andrés Borghi and Saibot Studios, published by New Blood Interactive. It mixes retro 2D exploration and combat with live-action horror scenes. The publisher announced the full release on October 16, 2026; a regional Steam view may show October 17. This is the released game, rather than an announcement-only preview.
Open the official Steam listing to install the paid full game or find the separate free demo. This guide follows release-game puzzles. An older demo route may stop earlier or use different progression. Nisu provides this guide and embedded player recordings; the PC game runs through its own installation.
The Steam minimum is 64-bit Windows 10 or later, a 2.4 GHz dual-core processor, 8 GB RAM, 4 GB VRAM, DirectX 11 and 13 GB storage. The recommended listing raises this to Windows 11, a 3.6 GHz quad-core CPU, 16 GB RAM and 8 GB VRAM. Check your hardware and current local store terms before buying.
The next sections reveal puzzle solutions. The final sections reveal ending conditions and a secret route. On Reddit, player mysterysincorporated specifically asked a reviewer to mark puzzle spoilers; use the contents to open only the room you need.
Read the room before spending health
Check your current movement, attack, sprint, inventory and interact bindings in the game’s controls menu. Most route steps below require standing beside an object and choosing Use from the inventory. Combine joins two carried objects; it does not automatically apply the resulting item to the room.
Against Obscuratus, interact with the lit arena candles until they are extinguished and the invisible boss is revealed. Attack during the visible opening, then repeat when necessary. If Vitria or a Relicta catches Julia, rapidly press interact to escape the grapple.
Fumus’s red circles depend on your equipped weapon. The Steam guide warns that a loaded gun makes stepping into one fatal; a melee weapon hurts Julia, while an empty gun causes a long animation. Unequip before clearing a circle, then move away from the remaining hazards before re-equipping. In the Sulfur arenas, break a glowing studio light when enemies crowd the space.
The published 1.0.1 hotfix adjusts some boss resource drops, finale enemy timing and a finale inventory bug. It also fixes infinite cardboard pieces and bottle-displacement behavior. Keep your game updated before relying on an older recording’s exploit or encounter timing.
Puzzle spoilers: open the apartment study
Take the Wrench from the bathroom beside the Devora poster, Developing Chemical from the kitchen and the Glass from the bedroom nightstand. Open the bedroom blinds and strike the window boards with the Wrench until sunlight comes through.
At the broken bathroom mirror, use the Glass to collect blood. Combine the resulting glass with Developing Chemical, then use that mixture beside the exposed bedroom window. The sunlight produces Auritsatio. Use Auritsatio at the sealed study door to open it.
The mixture’s inventory name is a useful check: Glass with Chemical and Blood still needs the window step. Simply removing the boards does not unlock the study. The puzzle video starts this sequence at 0:00.
Power the remote, then follow your own TV symbols
Find the Glove on the clothes rack in the second-floor office. Use it on the kitchen circuit breaker; when the washing machine stops, take its Battery. Interact with the bathroom curtain to reveal the other Battery.
Use both batteries on the remote in the third-floor office. Return to the second-floor apartment and read the symbols now displayed by the TV. Step on the matching floor symbols quickly enough to open the door beside it. The order is randomized: copy your screen, rather than a sequence from a video.
If you are following the secret Bible route on a replay, do its second-floor encounter before completing this TV puzzle. The ending section explains that separate prerequisite.
Retrieve the A.S. Key and reconstruct Devora
After meeting Sanguis, pick up the blue Triangular Stone beside the red candle. Also collect the Scissor Blade from the kitchen and the X-Ray from the short bookshelf near the apartment entrance. Use the stone at the blue symbol door near the second-floor elevator.
Inside, find the A.S. door with red carpet beneath it. Use the X-Ray and Scissor Blade there to retrieve the A.S. Key. The recording shows the paper-under-the-door method; stand at that door when using the items.
In the director’s office, interact with the desk and collect the second blade. Combine the blades into Scissors, then cut the six unusual cardboard figures in the hallway. Return to the torn Devora poster in the office and use a piece to start reconstruction. Assemble its six pieces, then use the Lighter on the completed poster to obtain the Bathroom Key.
Collect the Mop Handle from that bathroom. Its next destination is the square wall opening by the windows in the second-floor candle arena. Be ready for a fight. Extra pieces from an old duplication bug are not part of the intended solution.
Puzzle spoilers throughout. Chapters: apartment door 0:00, remote 2:14, stuck key 4:52, poster 6:18. Recorded in New Game+ with the Golden Cross, which is not the default first-run weapon.
From the bar to the films: follow the clue chain
At the bar, collect the four bottles and listen to the bell. Add liquid to the large pitcher, strike it with the Wrench to compare the pitch, and use empty bottles to remove liquid when needed. When its pitch matches, ring the bell again to break the glass and collect the USB Cable. Bottle proportions vary between runs.
Combine that cable with the USB Adapter found near the boarded door above the dining-room stairs. Charge Iván’s phone in the third-floor apartment to obtain the projector code. The Old Book preserves the clue. Projecting the first Devora canister opens a theater box containing the Plate with X; combine that plate placement with Black Tape in the dining room to reach the green Square Stone.
The film-school electrical room leads to an RCA Cable. The cinematography room uses camera views, a figure’s pose, a broken window and a Copper Seed grown into Flowers to obtain the Copper Key. After entering the dark TV room, activate its screens and record the color sequence. Light the Black Candle with the Lighter and use it in the elevator. Follow your Old Book’s colors from top to bottom: floor 3 is blue, 2 green, 1 red and 0 white. The sequence itself changes.
Later, purify the cursed canister with water collected in the Silver Bottle and exposed to moonlight. The third film opens the theater’s Cold Chisel box. The photo sequence needs a Red Lightbulb, Chemicals, Photo Roll, Negative and Photo Paper; develop the print, then use the finished Photo at the bedroom frame to obtain the Hexagonal Stone.
In Desiderium, memorize your own fly-room tile route and read the poems before choosing photographs. Fixed tile paths and an unrelated poem’s photo order can send you back to the start. The index below locates the relevant demonstration without treating its randomized answer as yours.
| Obstacle | Puzzle video chapter | Read in your run |
|---|---|---|
| Bell and glass | 9:37 | Match sound; bottle amounts vary |
| Projector access | 11:09 | Phone and Old Book code |
| Dinner plates | 14:05 | Black Tape and Plate with X placement |
| Electrical room / camera | 17:54 / 19:05 | Switch state and camera scene |
| Elevator | 22:20 | Your color order; then floor -1 |
| Cursed canister | 24:08 | Conversation, water and purification |
| Photo development | 27:27 | Red light, chemicals, negative and paper |
| Film school / Lead Fly | 34:21 / 39:24 | Your tile path and scene changes |
| Lapis Fictus / Aurifer | 41:19 / 50:11 | Inventory transformations before the finale |
Ending spoilers: the Aurifer branch
The two main endings split on whether you kill a Relicta ghost with Aurifer. SOLVE ET COAGULA follows the route without killing one; MAGNUM OPUS requires at least one such kill. The distinction concerns those ghosts and that weapon, rather than a general promise that every enemy in the game must survive.
Keep a separate save before making the choice if you want both outcomes. The Steam guide says a save there can be reloaded for the other branch. After the choice, return through the hotel doors to the studio lobby, reach the third floor, take the leaking doorway and continue left to Septimo Arte. Finish the resulting finale to earn that route’s ending.
The short recording below demonstrates the branch at 0:00 and 0:49. Its later chapters cover the Bible route at 2:05 and RENUNTIATIO at 5:50. RENUNTIATIO is shown by using the Apartment Key on the entrance door to leave; treat it as a separate exit choice rather than the Aurifer finale.
Major ending spoilers. The creator demonstrates the Aurifer choice, the order-sensitive Bible encounters and the Apartment Key exit. Nisu inspected selected passages; this is not a Nisu completion recording.
VIVUS EX MORTIBUS: preserve the Bible encounters
In iampanax’s demonstrated route, complete the two main endings, start a new game and collect the Bible from the desk. This path has three encounters that must happen before you finish the corresponding ordinary puzzle. Progressing past those points first can miss the route.
On the second-floor apartment, use the Bible. Start at the Man/Mars floor symbol and run counterclockwise around the symbols six times, before solving the TV puzzle. In the first-floor Community Center, use the Bible and enter 6666 at the lock before opening it normally.
On floor 0, enter the green-door cinematography room and use the Bible. Connect the yellow RCA cable to the camera and keep changing the channel until enemies appear. Do this before passing through the Copper Key door. Complete each hidden encounter and collect its Iron Cross.
With all three Iron Crosses, go to the third-floor blue door left of the elevator. Insert them into the wall to the right and enter the hidden doorway; continue the secret route through its encounter to the ending. Keep the three-cross checklist separate from the main Aurifer choice. The recording is the reference for the room transitions, rather than a substitute for a saved game at each prerequisite.
Quick help
Can I play Tenebris Somnia in a browser on Nisu?
The verified full game is a Windows PC release on Steam. Nisu hosts this reference guide and player video embeds, not the game installation.
Can I copy the TV or elevator solution from a video?
Use the clue in your own run. The Steam guide identifies TV symbols, bar bottle proportions, elevator colors and fly tiles as randomized.
Why does the video start with a Golden Cross?
The puzzle creator recorded New Game+ to speed up navigation and combat. That equipment does not describe a new player’s starting inventory.
What changes the two main endings?
Killing at least one Relicta with Aurifer selects MAGNUM OPUS; avoiding those kills selects SOLVE ET COAGULA. Finish the selected route to receive its ending.
What should I check if the secret route is missing?
Check both main endings, the Bible in the new run, all three Iron Crosses and the timing of each encounter. The TV, normal lock and Copper Key door each have a prior Bible step.
Source and scope
Release-game reference checked October 23, 2026 against Steam, published 1.0.1 notes, Metadata Rosenberg and Dalia’s Steam guide, and selected passages of iampanax’s recordings. Nisu has not purchased, installed or completed the game. The puzzle video uses New Game+ with the Golden Cross; its combat speed and equipment are not a fresh-run baseline.