When playing a multi-player FPS they will score head shots one everyone repeatedly from as far away as the maps will allow them to go with thier fists as the selected weapon.
A common occurance in the Counter-Strike games is to here the game's voice state:
"A Zalbar has joined the game, Counter-Terrorists win."
As Zalbar's unfailingly play as the counter-terrorists, and thier joining a game is considered an auto-win.
It is not yet known why.
Chuck Norris himself on many occassions has admitted that he is scared to leave the house unless Zalbar is asleep.
"Zalbars are just so awesome, it's frightening.", he says.
There was a character in the Xbox video game "Star Wars: Knights Of The Old Republic" whose name was Zalbar. This was merely a cooincedince, and he was not in fact a 'true' Zalbar. He was just a 7ft. tall walking carpet that made grenades for you and whined about privacy if you attempted engage him in a conversation.