The game's story is minimal, focusing on a single-player mode where you play as your favorite team, competing in a full season or playoffs. The goal is to win the championship and bring home the title, but there isn't much narrative beyond that.
Gameplay-wise, NBA Jam 99 offers a variety of modes, including single games (Head-to-Head), a full season, playoffs, and a practice mode. You can choose from all 29 NBA teams of the 1998-99 season, each with five star players per team. Selectable options include tag mode, power-ups, hot spots, juice mode, CPU skill and strategy.