Steam - one of the most popular services by means of which users can buy and download games, and Non-Steam - absolutely other party of a medal.
Steam
Perhaps, many users of personal computers are not by hearsay familiar with Steam service. It is one of the most popular resources thanks to which digital distribution is on sale and sounds, created by the well-known company Valve which is once engaged in development of computer games.
Here users of personal computers with ease can buy any pleasant game in special shop then they get digital access to it (the special code consisting of several digits and letters), can download it and derive pleasure.
Through this service the set of the computer games which are released under control of the company Valve and many other third-party developers and publishers is on sale. As a result the users who bought the similar software receive its digital copy with the license.
Non-Steam
Non-Steam represents a peculiar failure from the license and control. Some people working "for the benefit" societies crack Steam-versions of products which are on sale in shop. Certainly, this procedure not the simplest, but if desired the system of protection can be bypassed.
As a result it turns out so that Steam is withdrawn from a product, and it completely loses the license. Besides, in Steam it is impossible to start games which do not possess the license (for example, those which were bought on a counter and have no corresponding designation). They cannot be tied to the account in this resource, so and it is impossible to receive all that is provided by the developer of the user which acquired the licensed version of any given product (for example, to play in network).
By means of version Non-Steam (they can very easily be found floating around the Internet) the user has practically the same opportunities, only with one "But". It is that for example, in the multi-user mode the owner of the similar version of a product will be able to play only with those people who use Non-Steam the version (besides, the account in Steam can be blocked if the similar activity is revealed).
Owners of license copies play on the servers provided by developers and their accounts cannot be blocked. Other servers which users of Non-Steam of versions use are regularly blocked, so all the time is wasted information saved on it.