The ranking video compare steam games by daily peak player count.
Datasource:
https://store.steampowered.com/stats
Music:
Galway Kevin MacLeod (incompetech.com)
“Hot Pursuit” Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/
source