That's perfect^^ It will get downloaded and just work. No installation will be required.
As for DRM , yes it has DRM. IIRC valve has stated it has the master key for the DRM, and in case Valve goes out, they'll release you the games.
If you mean to use Steam purchased games outside Steam, then no you cannot, mostly. In case you want to add a retail purchased games to be authenticated by Steam, then it's up to the developer of the software really.And do I get the keys for the game so that I can play the game procured from other media/sources.
You don't get any serial key with Steam games.And do I get the keys for the game so that I can play the game procured from other media/sources.
My point is that you can buy CoD4 both retail and on Steam. Registering CoD4 retail on steam will not work.i don't get what you are trying to say. what i said is right afaik
I think you should be able to register Metro 2033 with your Steam account using the key if you want to.Already got this, though not from Steam.
What Jojo said is correct for the games in the list.
The opposite is not true however. If you buy a game via Steam, you don't get a retail copy or any CD-key, you only get the game authorized to your account.
Post your ID here: *www.thinkdigit.com/forum/gamerz/134533-share-your-steam-psn-xbl-xfire-etc-ids-here.htmlhey guys pls everyone having a steam account here pls give me your steam friend id so i can add you in steam in my friends list