Comet 64

Programming puzzles solved by coding on a retro home computer

Onur Ayas · Published by what sorceress this · Released Feb 5, 2021

Reviews: Mostly Positive; 75% of 199
Recent reviews: Not enough recent
Players: 1; daily peak, Oct 28, 2026
Steam Deck: Playable
Last update on Steam: 5 years ago; Mar 21, 2021
Minimum PC: DX10; 2 GB RAM · 0.1 GB disk; Full requirements

What is Comet 64?

Set in 1984, this single-player programming puzzle game puts you at a computer with its operator’s manual. You learn an assembly-like language and write code to transform given inputs into required outputs across more than fifty puzzles. You can refine solutions to reduce instruction and cycle counts for leaderboards, or tackle bonus visual grid puzzles.

For you if...

+you enjoy math-heavy puzzles and logical problem solving

Not for you if...

−you prefer arranging visual blocks to typing code

What players say

75% of 199 reviews are positive

Players praise the retro presentation. Criticism centers on the restrictive, verbose language and limited room for creative optimization; some players also find puzzle descriptions unclear.

Screenshots and trailer

Comet 64 system requirements

Minimum: DX10, 2 GB RAM, 0.1 GB of disk space.

As published by the developer.

Can my PC run Comet 64?

Tell us your graphics card once and every game page will answer this for you.

Set up my PC →

Minimum

OS: Windows 7 / 8 / 10
Processor: 2.0 GHz
Graphics: DX10, DX11, DX12 capable GPU.
Memory: 2 GB RAM
Storage: 100 MB available space
DirectX: Version 10

Does Comet 64 have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does Comet 64 run on Steam Deck?

Playable Playable: it runs on Steam Deck with some adjustments.

Default controller config not fully functional
Sometimes shows mouse, keyboard or non-Deck controller icons
Some text entry requires manually opening the on-screen keyboard
The native resolution is not the default one
Not fully functional without an external keyboard
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck
External controllers are not supported for the primary player

PC version details

DRM: None declared on Steam
Controller: Keyboard and mouse
Platforms: Windows, macOS, Linux
Achievements: 13
Steam features: Cloud saves, Family Sharing
Languages: Text only: English.

Does Comet 64 use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam