Valve 관련 링크들

http://www.atomicmpc.com.au/Feature/250941,inside-valve-studios.aspx
inside the Valve

http://www.businessweek.com/articles/2012-04-27/why-there-are-no-bosses-at-valve#p1
Valve 사내.. 뭐더라

http://newcdn.flamehaus.com/Valve_Handbook_LowRes.pdf
밸브 사내 지침서

http://2dboy.com/blog/wp-content/uploads/2011/09/difficulty.png
Steam 서비스를 선호하는 개발자들