After a promising start with the first CSI DS game (Dark Motives), the second game (Deadly Intent: The Hidden Cases) was a real let down. However, with Unsolved, CSI for the DS is back on track. You really need to think this one through, there is a lot of skill required, and the Interview Room is tough. I've played each case several times now, but I still can't get full marks (I'm getting closer though) in any case, but that's good as it means the game is challenging (unlike in Deadly Intent for DS). I highly recommend this game.