This could be things that once were commercialized but are now public domain, or have largely resisted commercialization to this day. In this context I mean this as aiming for profit and being sold/monetized.

  • Jackie's Fridge@lemmy.world
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    5 months ago

    Yup. I remember plating Battleship with pencils and graph paper. Great fun, and if your opponent cheats, make them use a pen so they can’t move their ships.