Cheats:
Double Sniper Zoom:
To zoom in twice with a sniper rifle, hit L and then click the right analog stick.
Haul More People on Vehicles:
To get three or more people on each vehicle, and have other players jump on the car while it's full. Then, the players on top of the vehicle will need to duck and they should stick on the vehicle without falling off.
Quick Turbo Recharge:
If you've used up your turbo in a vehicle and you want it to recharge very quickly, get out of the vehicle and hop back in. Upon re-entering, the vehicle's turbo will be fully recharged.
Hint-Kill The Queen & The Caretaker Fast:
For the spider queen when you first go in, get one person (on Co-Op) to go
down on the ground. Then the Queen should come out. When you first jump off
the ledge you come from there should be another ledge below it connected too
pipes leading to the first ledge, the person going down will activate the
Queen to come in then quickly turn around and jump onto the 2nd ledge
(Might take awhile but it works) then the Queen will be trying to get you
from the 2nd ledge. The person on the 2nd ledge shouldn't fire yet, get the
person on the first ledge to fire and distract the Queen then the person on
the 2nd ledge will jump down, (If your out of ammo there should be some ammo
lying on the ground) make sure the guy that's up on the 1st ledge has the
Queens full attention before doing this. Get the guy on the ground floor to
get the grenade launcher out, use the incendiary grenades or the flamethrower
too set the queen on fire which should quickly kill her faster than you both
jumping down and trying.
Hint-The Caretaker:
This is on Co-Op only, First attack the caretaker with the Laser until he
splits in half, that's half the job, get one of the players to kill the head
while avoiding its guns (Very deadly) mainly hide behind pillars while its
firing. Get the other player to attack the body so it cant regenerate which
then kills the caretaker fast than you both attacking one of the body parts at
a time.