5.6
"Death by Degrees tries to be a lot of different things, and it fails at all of them. The adventure is reasonably lengthy, and you'll even unlock a few additional minigame modes, but the game simply isn't worth completing, even if you're the sort of Tekken aficionado that wants to see some character development in Nina. The best thing that can be said about Death by Degrees is that it comes with a playable demo of Tekken 5, though the demo is limited to one player and two characters, making it too short and shallow to make up for Nina's failure."
http://www.gamespot.com/ps2/action/nina/review.html
"Death by Degrees tries to be a lot of different things, and it fails at all of them. The adventure is reasonably lengthy, and you'll even unlock a few additional minigame modes, but the game simply isn't worth completing, even if you're the sort of Tekken aficionado that wants to see some character development in Nina. The best thing that can be said about Death by Degrees is that it comes with a playable demo of Tekken 5, though the demo is limited to one player and two characters, making it too short and shallow to make up for Nina's failure."
http://www.gamespot.com/ps2/action/nina/review.html