Comet 64

Comet 64

Onur Ayas · 2021 · Programming, Puzzle, Simulation, Indie, Retro

PC
Mostly Positive75% · 182
Best price
$14.99
lowest tracked $5.39
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Steam
Standard Edition · Steam
$14.99
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About Comet 64


1984, february.
outside, it's dark. -and raining.
it might have started five minutes or five days ago.
hard to tell.
I've been coding.
if I stare at the screen long enough
answers come to me.
that's my super power.
outside, the city is sleeping.
but the caret is blinking at me.
and this new disk I got,
it's brutal.

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Comet 64 is a programming puzzle game. The year is 1984. All you got is a Comet
64 home computer and the operator's manual it came with.
  • Read the documentation (exists both in-game, and as a pdf) and figure out how
    to operate this 80s computer.
  • Learn its assembly-like (but not quite) programming language.
  • Solve 50+ input - output processing puzzles.
  • Improve your solution and minimize your instruction and cycle counts to compete
    in the Leaderboards.
  • Solve bonus visual grid-based puzzles.
  • Discover secrets? of the machine.

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Not recommended Mar 21, 2026
Can't turn off cursor blinking, worst feature ever! returned.
1 found this helpful
Not recommended Jul 26, 2026
I wouldn't go as far as to say it's a bad game; it is evidently very well-crafted in some aspects (like the delightful bichromatic aesthetic), but as a programming puzzle, it really leaves a lot to be desired. In terms of syntax, the language is more reminiscent of modern high-level ones but with many of the limitations of assembly, and this leads to very strange things. For example, the computer has no RAM, only type-specific registers (int, float, bool, char, string). There is a function that returns the length of the string, and in some cases, it's even possible to perform type casting; furthermore, the string in the corresponding register can be arbitrarily long (???). This mishmash of high- and low-level properties, however, made it really hard for me to immerse myself in programming this fictional language/machine, because in the end, they all seem like random features taken from other languages without a solid and organic architectural direction. And this issue is exacerbated when we get into the language's expressiveness. For instance, the bool register can only be used to evaluate whether to execute a jump or not; it is not possible to use it as an integer and therefore …
Recommended Jul 1, 2026
The puzzles took me about 5 hours in total to solve. It would probably take quite a bit longer to get all optimization stars, but I don't plan to do so. I do Advent of Code puzzles as a pastime, so I don't know if I would be the target demographic. I didn't find the puzzles all that difficult. The primary issue is not the algorithm itself, but trying to implement it with such an incredibly limited language and VM. Extremely few registers, no variables, etc... You do get a fairly nice debugger, allowing you to step through a program as it executes, set break points, and so on. I think without those tools (programming "in the dark" so to speak) it would be much, much harder. Pacing seems good. The bonus levels (the A: and B: disks) can all be cheesed very simply using a technique that would be familiar to competitive programmers, but I won't go into that here to prevent spoilers. It would probably be more fun to ignore that technique in favor of coordinate tracking (which is described in the instruction manual). My only criticism is the lack of any kind of story. The store page makes it sound as though there is some narrative that unfolds as you get further and further in, but ther…
Recommended Mar 27, 2026
Nice little pseudo-assembly programming puzzle game. If you like solving coding problems in heavily restricted environments, you'll enjoy this.
Recommended Mar 24, 2026
a good game
Recommended Jan 6, 2026
Comet 64 is a "Programming Puzzle Math" game using assembly-like (low-level language). If you enjoy this type of game, consider playing it.

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