You don't need any specific software just because you play games.
I've never had to un-compress a download from steam. In fact, I haven't used a compression tool to un-compress a game in over a decade(not since shareware and dial-up was common) - Maybe you do if you pirate games, but we don't do that here. If a game needs DX11, it checks for it, and installs it if needed. Drivers updates aren't just for gamers, yes you need them, but so does everybody else. Online games may need specific software(flash, shockwave, or silverlight), but they generally install what's needed when you install the game.