Screenshots
Watch trailer on Steam ↗VIVARIUMS
Amr Hassan · Published by Amr Hassan
Content notice: The game is set in a realistic, dark atmosphere. Both the player and the entities within are subject to violence, burning, or death.
Positive — 100% positive (10 reviews) · 20 achievements
Last updated 28 Sept 2026
Descend the Typhon Obelisk in the first-ever blend of classic Sudoku and first-person horror.
Adventure, Indie, Free To Play, Casual · 2025 · More free games
Navigate through the chilling corridors of the Typhon Obelisk, solving classic Sudoku puzzles to uncover hidden truths. Descend into an innovative blend of first-person horror and casual gameplay.
About this game
Experience the first-ever first-person Sudoku horror as you descend the reverberating infrastructure of the Typhon Obelisk layer by layer. Solve Sudoku, run, and hide as you unravel what kind of horrors lie within. Will you be able to successfully rejuvenate the obelisk back to life and save the world from drowning?
SUDOKU... BUT HORROR
Solve randomly generated Sudoku puzzles of varying difficulties with their accompanying atmospheric levels and environments. No layer plays out the same.
YOU ARE NOT THE ONLY ONE SOLVING SUDOKU
Something's moving between the endless pipes of the Typhon Obelisk... Better lay low and avoid making mistakes; you do not want to draw its attention.
RISK VS. REWARD
Utilize scattered devices and machinery around you to better your chances of survival. Are you willing to sacrifice a save station in order to solve a random cell in your challenging Sudoku puzzle? The choice is yours...
DIFFERENT WAYS TO PLAY
Challenge yourself to an enduring one-life run in the Endless game mode, or perhaps a Daily Run would be more your style? If you ever feel crafty, design your own VIVARIUMS experience in the Custom game mode.
System Requirements
Will my PC run this? →Minimum
- OS: Windows 10 or 11
- Processor: Intel(R) Core(TM) i7-9750HF CPU @ 2.60GHz
- Memory: 6 GB RAM
- Graphics: NVIDIA GeForce RTX 1650
- DirectX: Version 11
- Storage: 2 GB available space
Recommended
- OS: Windows 10 or 11
- Processor: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz
- Memory: 8 GB RAM
- Graphics: NVIDIA GeForce RTX 2070
- DirectX: Version 11
- Storage: 2 GB available space
Supported Languages
*languages with full audio support
Latest news
AnnouncementsOfficial
VIVARIUMS Is Going Free Forever!
Hey everyone, I have an exciting announcement to make:VIVARIUMS is going free on the 24th of April!Starting from that date, the game will be available to everyone at no cost. If you have already purchased VIVARIUMS, thank you so much. You were early supporters of a dream come true, of something I genuinely poured my heart into, and it means a lot. You will keep the game as normal, and nothing changes.Let's be real for a moment; VIVARIUMS is an unusual game. Sudoku horror isn't something that people see every day, nor is it something they are lining up to pay for. Instead, I'd rather have everyone experience this game with no price tag sitting in the way. Everyone deserves to explore this coalescence of two completely different genres.Thank you for everything.Read full article on Community Announcements (Rexolance)Patch NotesOfficial
VIVARIUMS Update - Version 1.1.0
New Game Mode: CustomDesign your own experience by selecting the level and adjusting any parameter as you like. Found a cool and tough Sudoku puzzle on a newspaper that you want to try in VIVARIUMS on maximum difficulty? This is the right place.Added 20 new Steam achievements.Expanded upon the Sudoku generation algorithm for a wider variety of puzzles. Expect tougher and more challenging Sudoku puzzles across the entire game.Reorganized and activated many elements on the main menu to be shown even if the campaign has not been completed yet.If you wish, you can now hold the V key on the main menu for 5 seconds to unlock all game modes instantly.Readjusted the frequency of some of the PHASOR's actions for a more streamlined gameplay experience.Reduced the frequency of blockades spawning while also equalizing the chances of different variations appearing.Reduced the frequency of navigators spawning, but they now glow in the dark and feature more entries across all layers.Rewritten the text shown in the tutorial to be more helpful and to reduce confusion.Added a small interactive crosshair to the HUD.Altered the descriptions of all interactive elements to be more understandable. For example, input valves now tell you which number you are dealing with.Added 2 new cell variations to the Reservoir layer.Added new doorways to some cells in order to decrease dead ends.Removed the motion blur postprocessing effect when being chased.Improved the camera shake when falling from a high place.Increased the cooldown of normal rechargers from 10 to 12 minutes.Reduced the cooldown of heaters from 10 to 7 minutes when using the "DISTRACT" option.Refreshed the lore to be more direct and interesting.Various bug fixes and performance optimization.Read full article on Community Announcements (Rexolance)
