4v4
4v4 is a new gametype in competitive TF2, preffered by players for it's more relaxing gameplay and forgiving rules. It is currently only played in the UGC league, with the highest skill Division being Gold.
4v4 teams are usually made of a default Scout, Soldier, Demo and Medic lineup, but teams may experiment various lineup combinations. Each combination offers a different approach to the game.
Some popular combinations are:
Pyro, Soldier, Demoman and Medic
Scout, Pyro, Demoman and Medic
Scout, Soldier, Pyro and Medic
Scout, Soldier, Demoman and Heavy
4v4's rules are similar to 6v6, the only differences being the dissalowance of a Heavy-Medic combo and allowance of multiple offclassing.
Most commonly played maps (based on UGC Season 1-4) in 4v4 are: cp_mojave_b#, koth_viaduct_pro#, koth_airfield_b# and cp_warmfrost_rc1.