The roles are :

The AWPer :The AWPers are self-explanatory, just be good with the awp.And also be decent with a rifle.

The Rifler:The rifler can choose their weapon of choice.For example: SMGS,Assault rifles etc.

The Lurker: Unpredictable to keep the enemies on their toes. - Great knowledge of rotations. Great positioning. Great use of sound. Great communication.

The Entry Fragger:Entry Fraggers are The first one in. - Aggressive. Great shot. Great communication

Support: Aid those in need of a pop flash or smoke. - Great knowledge of nades. Passive. Can stay calm and pick up trade kills. Great communication.

Strat Caller: Aid those in need of a pop flash or smoke. - Great knowledge of nades. Passive. Can stay calm and pick up trade kills. Great communication.

Average Team Should Have: 2 Riflers,1 AWPer,1 In-game leader / strat caller and 1 entry fragger.Lurkers and Supports are optional