my favourite game is "Mornington Nomic" - I have the only extant copy of the rules, but the basics:

1. Everyone takes turns in order

2. A turn has 2 parts:
* the player proposes a rule addition/change
then, everyone votes on whether the rule change should be adopted - if the vote goes through, it's now in the rules!
* secondly, the player makes a move on a map of the london underground.

3. A player wins if they move to mornington crescent
4. No player can move to mornington crescent