I'm in the Spy Party beta (and you could be too!), and while I've only played a few games, I can tell you that it's a lot of fun. It's obviously a very assymetric game (sniper vs. spy), but both sides are really well done. When you play as the spy, walking around the party and trying to complete your objectives, you feel totally naked and exposed, and that your every move is being scrutinized. When you play as the sniper, you feel almost overwhelmed at the number of people in the party, and helpless that you can't watch every spot in the room at the same time. It's remarkably tense and a lot of fun.
I'm the developer of Hidden in Plain Sight, which I was happily surprised to hear mentioned on the show. While Spy Party is a deeply intense single-player experience (that is, you're probably playing alone in your room with a single online opponent), HIPS is more like a party game, with up to four players in the same room. It shares the concept of using tension to create a fun play experience, but it's a lot more light-hearted and jovial, with lots of laughter and shouting at the end of every round. If you are lucky enough to get together with friends to play games, you might consider giving it a try.
It will also be on display as an IndieCade 2012 finalist, so if you're in the area and want to check it out, it will be there.
