NBA Jam is an arcade basketball game that lets you play two-on-two with players from all the NBA teams. The gameplay is fast and action-packed, with few rules, no fouls, and deliberately unrealistic jamming. Players are rated on eight ability categories, from steals and blocks to dunks and 3-pointers.
Up to four human players can take part, each controlling a single player for their team, and AI for missing players. This allows for four players to face each other in teams of two or for two players to team up against a third player with a CPU team-mate.
The Tournament Edition ups each team's roster to three players, and allows for substitutions between quarters. Shoving players now results in injuries, which lower a player's stats; encouraging you to sub them out and let them recover. Aside from the usual secret characters and cheat modes, the T.E. also includes new features such as "Hot Spots" that reward extra points for making baskets within specific zones.
The game has several powerup icons that appear randomly, giving temporary arcade-like benefits when picked up. These include instant "on-fire," enhanced 3-point accuracy, monster dunks from anywhere on the court, or a bomb that knocks all other players to the ground.
There is also "Juice Mode" which increases the speed of the game up to 4x.
"Tournament Mode" disables all other modes and challenges you to defeat all the NBA teams to unlock extra players. Winning Tournament Mode also unlocks a higher CPU difficulty level.