Steam has revealed the top selling/highest grossing games on its platform for the year 2017, and with come some surprises, and some non-surprises as well. The distinction between top selling and highest grossing is a needed one, if you look at the top Platinum tier. There are two free-to-play games on it, which really isn't much when you consider that the category itself contains 12 titles. Still, it does go to show how correct monetization of free-to-play games leads to impressive earnings for companies. Joining those two titles are the usual multiplayer galore of titles. The hit phenomenon Player Unknown's Battlegrounds stars in 4th place, behind H1Z1, Grand Theft Auto V, and Rocket League. When it comes to single-player games, The Witcher 3: Wild Hunt holds its own on 6th place in the Platinum list, a remarkable feat if one considers the game was originally released in May 2015, and hasn't seen added content for a year now.