Players are given three "Nitro" boosts per race. Extreme-G has a championship mode ranging from novice to expert, shoot-em-up mode (named "Arcade Mode" in XG2), multiplayer racing, and deathmatch.
The provided text describes the features of Extreme-G, including the number of "Nitro" boosts available per race, different game modes like championship, arcade, multiplayer, and deathmatch.