CounterStrike: Global Offensive (CS:GO) imitated the hats marketplace of TF2 within 2 years of its release. Instead of silly hats, Counter-Strike offered its players cosmetic skins to trick out their weapons. Additionally, they allowed creators to develop skins to feed their weapon crate series and thus made a creator-based marketplace that was backed by Valve and endorsed by professional players. In 2018, Valve made $414 million on CS:GO, with a great majority of that revenue coming from their cosmetic market.