Watch out for:

1). 'Teamers' Teamers are 2 or more people who team up to attack 1 person.

2). 'Laggers' An easy way to kill a lagger is use grenades instead of the slow melee. Grenade the lagger between his "Lag Warps" to kill him.

3). 'Pros' Use the tips/tricks section to learn ways to defend yourself against the 'pro'.

Watch out for Jake Rage...