ABI-DOS

Simulation· Puzzle· Programming· Automation

Released Nov 2024

Build the most advanced operating system ever created! Can you master the fictional simulation language of this mind-bending machine? Design circuits, automate UBITS (coloured mobile data blocks), and optimize your system. The Admin is always watching, and he’s not what he seems.

92% positive · 438 reviews

Done

All announced content has been released

High confidence

Done

All announced content has been released

High confidence

Where to get it

Free on Steam

Steam Free

Evaluation

ABI-DOS launched on November 15, 2024 as a paid puzzle game. After modest sales in its first month and a half, the developer announced on December 24, 2024 that the game would become free starting January 2025, explicitly stating: "the game's content will likely remain unchanged from its current state." On January 4, 2025, the game officially went free, and the developer confirmed: "The game is fully complete and features no microtransactions." This is a clear, unambiguous statement from the developer that the game is finished. Following that transition, updates have been limited to bug fixes and minor quality-of-life patches (localization, leaderboard fixes, UI corrections) — consistent with a completed game receiving maintenance support rather than new content. No future content has been announced or hinted at since the developer's completion statement.

Evidence

Developer confirmed the game went permanently free and explicitly stated: 'The game is fully complete and features no microtransactions.'

news post · Jan 4, 2025 source development ending

high

Developer announced the game would become free in January 2025 and stated: 'the game's content will likely remain unchanged from its current state.' No further content was planned.

news post · Dec 24, 2024 source development ending

high

Media

Details

Developer

ABI.DOS.SOFTWARE

Publisher

ABI.DOS.SOFTWARE

Achievements

Platform

Windows

Controller

—

Steam Deck

Playable

Players

Single-player

Simulation Programming Automation Puzzle Strategy Sandbox Education Building Hacking 2D Procedural Generation Abstract Logic Futuristic Relaxing

About this game

Recover damaged images:

Fix corrupted files:

Design the logic:

Simulate the program:

ABI-DOS: The Ultimate Automation Puzzle Challenge.

In ABI-DOS, you build circuits to manipulate and guide UBITS (colored digital blocks) toward specific goals based on the given documentation. By strategically placing wires and instruction blocks on a microchip, you manipulate inputs to achieve desired outputs—whether it’s fixing corrupted files, recovering damaged .png images, or simulating particle trajectories. ABI-DOS challenges you to meet strict specifications through inventive problem-solving.

No programming experience is required, as everything is explained in-game. The focus is on assembling logical solutions within space and operational constraints rather than on real-world programming concepts.
The puzzles are challenging and offer no predetermined solutions, allowing for multiple approaches. Each level starts with a blank canvas, giving you the freedom to create your own unique solution from scratch.
You are encouraged to optimize your algorithms, fostering creative exploration and friendly competition as you compare solutions with friends and on global leaderboards.

With over 50 puzzles and more than 50 hours of gameplay, ABI-DOS offers extensive content for players to delve into.
The work is overseen by the system's Admin, a mysterious figure who is not what he seems. Set in a retro-punk world, this enigmatic presence adds an extra layer of intrigue as you uncover the deeper mysteries of the system.
Drawing inspiration from Zach-like games, ABI-DOS pays homage to its predecessors while offering a fresh perspective on the assembly puzzle genre.

Last evaluated Jun 21, 2026