smoker- primary attack, move your cross-hair over a survivor, when it turns read elft click you will send your tongue out and pull him towards you, you have to get used to judging how far the tounge will reach thoug it wont go on for ever.
Try and pull them off ledges/back from drops.
Hunter - primary hold your crouch button to charge your pounce when it's full press left click to jump on a survivor and tear him a new one.
Aim slgihtly up as you travel in an arc.
Try and use your pounce to get to high places the further you fall/travel the more dmg you do.
Boomer- primary attack vomit, spawn ahead of survivors, and veryclose to them then left click and puke on them this will attract a horde and blind them.
be carefull you're very noisy and very weak don't spawn too soon or you'll get shot and killed.
Spitter - primary attack fires a glob of acid out and forms a pool, try and hit survivors when they are boomed/traped i na room by they horde so they can't escape.
Charger, primary attack makes you fun full pelt into the survivors (you can't stear after triggering ir -left click) so line up down a corridor and ram into them first one you hit you'll grab and carry away, any others will be knocked aside for 10 dmg.
TRy and charge people off ledges/into water.
jokey, primary attack you jump on thier head and can then control the survivor till knocked off or killed, try to run them into spitter goo or off ledges.
Your jump is very short range you have to be stood next to the survivor to get them.
Tanks- primary punch, does what it says on the tin send survivors flying, try to punch them off ledges/into water
Secondary throw a rock, once you press the button you will be stood still while you rip a cunck of concrete from the ground and throw it at them. aim well and do it from cover as your a sitting duck.
The tank is slower than a survivor on green health chasing them will get you killed unless you can out manuver them.
Melee weapons will rip you apprt as a tank so at first its best to throw rocks from afar til lthey are boomed then go in while they're blind and being slowed down by zombies.
Sorry for typos I'm **** at typing.