PROOFMARK Devlog - itch.iohttps://csaf.itch.io/proofmarkA Game Boy deduction game. Every day the mint changes what "genuine" means, and nobody tells you what.https://csaf.itch.io/proofmark/devlog/1640695/a-deduction-game-has-to-prove-it-is-never-asking-you-to-guessA deduction game has to prove it is never asking you to guesshttps://csaf.itch.io/proofmark/devlog/1640695/a-deduction-game-has-to-prove-it-is-never-asking-you-to-guessTue, 25 Aug 2026 18:26:46 GMTdevlogPROOFMARK is out. It is a real 32 KB Game Boy cartridge, and the free demo on the page is the same cartridge compiled with a two day limit, running in your browser. The pitch is simple: every day a hi...

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