USP-S | Serum was added to the game on November 8, 2013, as part of The Arms Deal 2 Collection, which was released alongside the “Arms Deal 2” update.
The chromed body of the pistol is adorned with an abstract pattern resembling camouflage. The color scheme of the pattern includes green, orange and various shades of gray.
Float Value of the skin is limited from 0.00 to 0.25, which makes USP-S | Serum available in all conditions except Well-Worn and Battle-Scarred. Abrasions are present on the body of the pistol already in Factory New condition. At levels of wear close to the maximum, the size of the abrasions increases slightly, the body of the weapon is coated with a layer of patina, which makes the skin look noticeably darker.
The pattern index affects the texture overlay. Rare or special variations of the pattern are absent.
The quality of USP-S| Serum is Classified. The skin has a StatTrak option.
At the moment, USP-S | Serum is not on the list of popular skins and is rarely seen in the game.