I just spent the past two hours glued to my tv playing this fairly new game called Rocket Riot. Holy shit is this game addicting. It's very similar to Worms... but it isn't turn based... and you fly around on jet packs... and fight pirates. It cost me around 800 M$, yeah i bought it. I really wasn't able to get my fix from just the demo, man I needed more!
Best thing about a game this addicting? No need for seedy alleyways to score some RR, all you gotta do is turn on your 360.