Omaha Hi Poker
Omaha Hi is a version of Texas Hold'em where players are dealt 4 hole cards instead of 2. But there's a catch: 2 and only 2 of the hole cards can be used in making the final hand. Omaha Hi is also known as Omaha Hold'em or simply Omaha.
The 4 hole cards make Omaha a 9-card game and having more cards to choose from means players will typically finish with stronger hands. Poker players being the people that they often are, the possibility of higher hands typically means that players stay in longer and the pots will grow accordingly.
In practice, Hold'em players will find that the focus in Omaha Hi tends more towards playing the cards than playing the other players.