If you mean how can you level up your perks in killing floor?
Check your perk list and on a window it'll show the requirements to do in order to level up a perk...
you find the maracas by killing a certain ghoul on crypt floor 8.
The duration of The Killing Floor is 1.57 hours.
The Killing Floor was created on 2007-05-21.
You can level up fast from anything. You can kill monsters or go do quests. Its impossible not to level up fast from killing monsters or doing quests. Unless you are killing very weak monsters like level 1 or something.
To buy the game Killing Floor (or atleast one way to buy it) is to make a Steam account which is free. Then search the store for Killing Floor and...you can do the rest probably.
You have to get master form up to level 7. You level up master form by killing heartless.
Killing Floor - Bruce Dickinson song - was created in 1998.
go to www.youtube.com and surch gymnastics/ floor. plenty will come up. if you are looking for a certain level then type in gymnastics/ floor/ level ___.
Killing Floor - Howlin' Wolf song - was created in 1964-08.
If you want to level up faster, make sure the enemies you are killing are the same or higher level then you, this will grant you more experience per kill. Killing bosses can give large amounts of experience as well.
by killing enemies, if your talking about online
use a level. jack th floor back up also. use a level. first Jack the floor back up at where ever it has become unlevel.