Jak II Tips

get orbs that you missed before(only in fortress)
If you missed any of the 8 orbs in the first level, then you can get them later in the game. In the mission where you have to free the shadow and everyone, right after having the precurser stone stolen, you end up in the same place you started at. You'll have to come back after you free them in order to get the stuff. Look around the vicinity of the prison, and you'll find where you first exited.