According to SteamSpy's 2017 data, only 100 games accounted for 50% of all the sales revenue generated by Steam. This data was presented by Sergey Galyonkin, the creator of the Steam statistics site SteamSpy, at last week's GDC.
This is a companion discussion topic for the original entry at https://ink.mostepic.win/the-top-100-games/