SKULLs are the most remarkable weapons designed in Counter-Strike Online. All of them are very accurate, has high clip size, high reserved ammo and uses Anti-zombie bullets ( that means double the damage dealt to zombies !) except Skull-9 (A highly destruction melee that can deal epic damage to multiple targets) which make them very suitable for engaging zombies.
In any scenario mode and zombie mods, they are very famous as they can deal tremendous damage to zombies, as well as crowd-control.
However, in Normal matches, some players in the game might leave when they see some others player use one of the Skull in the Skull series weapon because they're powerful and sort of imbalanced gameplay.
SKULLs are sold for a limited time only ! grab them all while you still can ! you won't reget buying them.