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Comet 64

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About Comet 64

Comet 64 is a programming puzzle game set in 1984. You have a Comet 64 home computer and its operator's manual, and must learn how to use the machine and its assembly-like programming language.

Solve programming puzzles

Read the documentation and write programs to solve more than 50 input-output processing puzzles. You can refine your solutions to reduce their instruction and cycle counts, then compete on the leaderboards.

Explore the machine

The game also includes bonus visual, grid-based puzzles and secrets to discover about the machine.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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