Unique... maybe a couple
Mirastiko (me - ras -tic - oh)
Game is played with hole cards, and community cards.
The middle card dictates the money card, pot is usually split 1/2 hi and 1/2 based on money card.
Plays similar to Omaha/Big-O. 4 or 5 cards in your hand, must play exactly 2.
Board is 5 cards, and is pre-dealt face down (although I'd like to change that), with the middle card turned sideways.
First card is exposed. Betting round.
Turn another card. Betting round. Repeat until board is exposed entirely.
High gets half the pot.
Money card gets half the pot.
The money card is the card ranked 1 lower that the middle card, of the same suit. If nobody holds (or can use) the money card, then it goes down in rank to the deuce. The money card must be in your hand. Not shared if it appears on the board.
Options:
We play with 5 cards to each player.
We also run 2 (4-card) boards, with a single middle card. We've done 3 & 4 boards as well.
The middle card does not have to be 'progressive'. If 10c and nobody has the 9c, then hi scoops the pot.
If the middle card is a deuce, can 'go up', 'be dead' or convert to hi/lo (no qualifier). I think going up is best.
Betting limit of 10BB per card. Or 10BB until the river, then 40BB on the river.
We also play that you must use the money card as one of your 2 cards playing for high. It's generated a number of rule extensions, so you may prefer just to ship half the pot to the money card, even if it's not part of the 2 cards you are playing.
If required to use the money card and progressive:
A. If a player can use the money card and also make high hand, then they scoop the pot (or take 1/2 and chop if tied for high).
B. If a player can make the high hand, but can't use the money card to do so, then they must play the high hand if that earns them 1/2 the pot. The other 1/2 pot will go to the next highest card under the middle. This prevents a player from deciding which of 2 players gets the other 1/2 of the pot. (the 2nd high hand or 2nd money card).
C. If a player can make the high hand, but can't use the money card to do so, but playing the high hand would chop (get 1/4 or less of pot), then they play the money card to get 1/2 the pot.