Not an RPG, and not really tabletop, but I've got an idea for a game. A To aru Majutsu no Index Card Game where most of the cards are primarily Index cards. And by that I mean:
The rules:
Spoiler for :
Two players have 3 cards in their hand. A Kamijou Touma card, an Index card, and a Yamisaka Ouma card who is this guy if anyone remembers.
Each player selects one card and a loser is decided rock-paper-scissors style followed by an accompanying penalty game.
Ouma kidnaps Index (loser gets tied up by the winner)
Index bites Touma (loser gets bitten by the winner)
Touma breaks Ouma's illusion (loser gets punched by the winner)
If at any time both players play the same card, a third Touma may appear and break the illusion of this paradox and return the world back to normal. That is, both players get decked.