Off the Wikipedia:
The Hooligans are divided to several classes, the Leader is the central member to the entire squad and the only one able to use handguns and rally his men and other members of the firm. The Rat acts as a scout and can break into residential places without alerting the law, but has limited stamina and easily gets drunk and high. The Hooligan is the demolitions expert and is used for crowd control. The Raver is a party-going member who can distract other gang members by using his loud boombox and has strong drug tolerance, but low alcoholic tolerance. The Biker and Bulch have the most amount of health but the Biker can drive any car, sing it as a transport or as a weapon against enemies. The Bulch is one of the three major units, an overweight dumb man who functions as the muscle, beating up other hooligans as well as being able to push certain objects to limit the movement of the enemy.
During play the members of the gang must be sustained by administering drugs, alcohol and violence on a regular basis. Failure to keep the gang members fueled will see them drift off to more peaceful and legal activities. Looting of the local shops during the game can provide funds for the gang, and the player must overcome resistance from both rival gangs and the police forces to achieve victory.