Age Of Booty has SecuRom + limited times of activation, on top of the steam drm. Do I have to say more? Sadly I have seen it too late and hence threw one buck out of a window with buying this crap. Ah well.
Do yourself a favor and stay as far as humanly possible from this messy XBLA port of DRM loaded bs game. Ugh. (Or gift it to people on your friendslist you dislike during a steam sale. Whatever floats your boat xD Just do not ever -- and I mean NEVER EVER -- actually buy it in the intention to install it on your system to play it. Nope. Nope nope nope.)
TL:DR: If there would be a prize for the best combination of crappy, poorly done ports and intrusive (like registry deep) annoying, sh*tty drm for a game, Age Of Booty would win it. By far.