Dallinor on 28 April 2008
If you're going to use the PSN I suggest giving Pixel Junk Monsters a look.
The game costs a mere €4.99, but it's given me easily 30 hours worth of entertainment up until this point. It's fixed screen defensive tower gameplay with co-op.
SuperStardust HD is also worth a look. It again has co-op (great for mini games) but this time you control a space ship flying around different planets blowing up falling meteors and fighting bosses.
