[quote name='the3rdkey']Nope.[/QUOTE]
Actually you do have to register. I can't believe that you didn't have to do it. I had to register a login name/profile and some other basic info.
I don't know if you have to upgrade as I am at 2.0 on the PSP that I play it on. The game does have a 1.52 upgrader on it, so I imagine so.
The game is pretty fun, even though there is just the one map. I
Press Square for jumping up onto higher levels, etc. Square for dancin' also.
The controls are fine. But for anyone that is a die hard FPS, then the controls are pretty weak. I always have to auto aim, as the controls are far, far too erratic otherwise. Forget the head shots. It's fun and good enough for a portable FPS.