This is not true. For example Anno 2070 on Steam 3rd-party DRM: Solidshield Tages SAS 3 machine activation limit Steam games are allowed to use any DRM they want. So it has both machine activation limits and at one time required an internet connection to play until Ubisoft changed it. You can buy MMOs on steam which require a subscription plus internet connection to play. Steam is a publisher and distributor. If they aren't the publisher, the game may come with an internet required DRM system.