Steam does have some games with varying levels of DRM requirements including some without it. It's up to the publisher on what is used. Here's a list http://steam.wikia.com/wiki/List_of_DRM-free_games
I'd imagine most of those games without any DRM are available from GoG and/or Humble Bundle stores too :)
[–] DigitalTendencies ago
Steam does have some games with varying levels of DRM requirements including some without it. It's up to the publisher on what is used. Here's a list http://steam.wikia.com/wiki/List_of_DRM-free_games
I'd imagine most of those games without any DRM are available from GoG and/or Humble Bundle stores too :)