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Calculate It›Events›New game from our studio: "Door4: Ultimatum" was released on Steam.
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New game from our studio: "Door4: Ultimatum" was released on Steam.

Calculate It · published 17 months ago

All eventsPlayers around this dateRead on Steam

Dive into the captivating world of puzzles with the new part of the Door game series. Your task is to find the correct door among many options to advance to the next level. But be careful: only by understanding the patterns and solving puzzles based on logic, creative thinking, and clues hidden in the surrounding world you can unlock the coveted passage. If you fail, you will be pushed back, and the solution will change.

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Beautiful Open World

Explore a beautifully stylized open world filled with colorful and diverse locations. Each place hides its own mysteries and puzzles waiting to be unraveled. Pay attention to the details—they may lead you to additional plot twists and hidden information.

Simulation? Or Something Else?

You will find yourself in a mysterious place, and only by starting to solve puzzles and exploring the surrounding world can you piece together the story of where you are and how you got there. Discover numerous secrets, explore every corner, and immerse yourself in an engaging plot that will unfold before you as you progress.

Get ready for an exciting journey full of puzzles and unexpected discoveries!

Game Features:

Solve puzzles that contain the main mechanic: choosing the correct door.

Use clues in the environment and logic to find the answer.

Collect puzzle pieces to gain access to new areas in the open world.

Solve additional puzzles with hidden mechanics to uncover plot mysteries and access secret locations within the game world.

Puzzle answers are randomly generated each time you start, but you can save your progress through checkpoints and collected or activated items.

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Major update9 Feb 2026Version 0.5 was released in the default branchNew features in version 0.5: Added: · Visual changes · Redesigned interface · Boss: "After pressing the 'Submit' button, the required number changes" · Boss: "The required number increases by 1 each time a charge is spent" · Achievement for winning on the binary calculator · Achievement: "Impossible" · Passive: "Rare Item" · Button: "Mirror" · Button: "Credit" · Collection of passives · New dif…In-game event11 Jan 2026Version 0.5 was released in the betaAdded: · Visual changes · More pleasant visual display of buttons and animations · Boss: "After pressing the 'Send' button, the required number changes" · Achievement for winning on the binary calculator · New passive: "Rare thing" · Achievement: "Impossible" · "Flip" button · Added passives in collection · New difficulty: "The 1st button in the calculator is replaced with a non-working one" Ch…Major update31 Jul 2025Version 0.4 was released in the default branchNew Features in Version 0.4: -A tutorial has been added to the game; -Passive abilities for calculators have been added. You receive one passive ability of your choice at the beginning of the run and after the boss battle. A maximum of 4 passive abilities can be on one calculator; -A new background in the style of Windows XP has been added; -Buttons added: "Percentage": Calculates the selected…