Nah see my other comment. You don't own shit on Steam. In fact the agreement specifically says you may need to use the client and be connected to the Internet in order to even play your games. Like if steam shut down tomorrow and just stopped existing it's very possible they could legally just give you the middle finger and say sucks for you.
IANAL and there's more to it than just the contract you have with Valve as far as the law goes but the way the contract is written you have no ownership of anything on the platform.