That said, while most people play video games by themselves, I can even imagine Understand as a decent cooperative experience (with multiple people sharing hypotheses and one person controlling the mouse), e.g. for couples or group houses. Unfortunately the game is not available on smartphones, which makes this more cumbersome.
I think that an interesting concept would be a multiplayer game in which you create rulesets for friends with certain limits. It could be a competition between several players in which you earn points by passing the level or by... (read more)
As mentioned at the top, this video game is inspired by the board game Zendo, which is a bit like what you propose, and which I've seen played at rationalist meetups.
For games with similar themes, Wikipedia also suggests the games Eleusis (with standard playing cards) and Penultima (with standard chess pieces).
I think that an interesting concept would be a multiplayer game in which you create rulesets for friends with certain limits. It could be a competition between several players in which you earn points by passing the level or by... (read more)