Modded Gaming Systems?

[2+2 wannabe]

Is it possible to get systems that include all (or many) games of a specific system on it? I've heard that you could get Xboxes with a [censored]load of games already included on it - I don't know what types of games were included though.

Can you do that with SNES/NES/Nintendo 64/Genesis/etc. games as well? Where would you go about getting a system like that? I would be specifically looking for Super Nintendo games on a system without having to actually buy all of the games separately. And I'm not looking to get a computer emulator either - I want something to hook up to the tv.