Recently, a leak in the Steam API allowed everyone to see some of the most accurate player counts available to date. While the information presented does not fully represent hard sales data, it does count every player that has played a game with achievements more than once on Steam.
While looking through the list we thought it would be interesting to see exactly how well indie games were doing compared to major releases.[]
Source: N4G PC 10 Best-Selling Indie Games, According to Leaked Steam Data