Almost all of the games in the NFS series employ the same fundamental rules and similar mechanics: the player controls a race car in a variety of races, the goal being to win the race. In the tournament/career mode, the player must win a series of races in order to unlock vehicles and tracks. Before each race, the player chooses a vehicle and has the option of selecting either an automatic or manual transmission. All games in the series have some form of multiplayer mode allowing players to race one another via a split screen, a LAN or the Internet. Since Need for Speed: High Stakes, the series has also integrated car body customization into gameplay.