NBA Jam is an arcade basketball game that lets you play two-on-two with players from all the NBA teams. 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 four new additions that can be individually enabled from the special options menu:
- "Hot Spots" are randomized zones on the court that reward extra points for making a basket while standing within them.
- Powerup icons appear randomly, conveying temporary arcade-like benefits when picked up, such as 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.
- "Juice Mode" increases the speed of the game up to 4x.
- "Tournament Mode" disables all other modes, special characters, and cheats, and challenges you to defeat all the NBA teams to unlock extra players. Winning Tournament Mode also unlocks a higher CPU difficulty level.
NBA Jam was released on the Sega Game Gear in 1994 .