Dont know if I can trump Munchkin, but I have the little white box TSR Empire of the Petal Throne.
But, woo hoo, Im prehistory!
I remember having to make 'twizlers' for D&D, (a piece of card with various numbers of sides, with a matchstick through the middle in place of dice).
Then, there was the blue polyhedrals you had to crayon in yerself.
You kids, you dont know what it was like in my day.
But, er, yeah, a TSR hexbook and yer own universe. Great days.