I made a fun card game once
You have five random cards
You play one, upside down, and your opponent does the same
You say what your card is, and they say what theirs is
But if the loser thinks the winner is lying, they can challenge
(If no challenge occurs the winner keeps the loser's card and the winner's card is discarded)
If the challenge is unsuccessful and the winner really won, the winner can keep their card as well as the loser's
And if it's successful the loser can keep both
The goal is to be the last person with cards remaining
If there's a tie, you just each play another card, and the outcome applies to both of the cards played by each player
So ignoring challenges the winner keeps both of the loser's cards and discards their own two
If there's a tie and you have no cards remaining, you lose
In a tie, either party can challenge
If one challenges, normal challenge rules apply
If both challenge and only one lied, normal challenge rules apply
If both challenge and neither lied, you continue with the tie as usual
If both challenge and both lie, both cards are discarded
The person who says their card first is whoever gained cards in the previous turn, or if neither/both did, the opposite person as the last turn
Actually ^ might be incorrect
Idr how it was determined who says theirs first
