Dejarik, also known as vrax, was a popular game which withstood the test of time better than nearly any other game in the galaxy. It originated as a Jedi game, though, as it became much more widespread over time, many beings became unaware of its origins.
Dejarik was played on a hologame table, which comprised a hologram generator within a table-sized cylindrical base, with a black-and-white checkerboard pattern on the top surface. When active, holomonsters - full-color, three-dimensional hologram playing pieces measuring between 5-30 cm tall - would be projected on the board. The pieces all resembled creatures, real and mythic, from throughout the galaxy, including the Mantellian Savrip, Grimtaash the Molator, Ghhhk, Houjix, Ng'ok, Kintan Strider, K'lor'slug, and the Monnok. These pieces, when moved by the player, actually acted out the moves as if really specimens of their species. If the pieces were not used for a certain amount of time or the game was abandoned by both players, they would simulate boredom.
Major dejarik tournaments included the Galactic Core Interzonals. The kintan strider death gambit was a notable tactic.
Another notable tactic was the fork, in which a player moved one holomonster to threaten at least two of the opponent's, so that no matter what the opponent did one piece would be lost. It was considered a mistake in play to leave oneself vulnerable to a fork. The word fork came to be used as a generic term for facing a choice between two disasters: "We are well and truly forked." 
The Millennium Falcon had a dejarik table in its lounge. It was around this table that preliminary peace talks between Gilad Pellaeon of the Imperial Remnant and Leia Organa Solo of the New Republic were held.
In many biographies (both official and unofficial) Palpatine is compared to a Dejarik Grand Master.