A must-play for fans of the series for the PSP.
Most of the missions require quite a bit of sneaking around. Once I figured out to just slow down and sneak around everyone, the game was much more enjoyable. Certainly in the later missions, the enemy is much too strong (and too numerous) for a head-to-head fight. It is much better to snipe them, or sneak up from behind for a knife-kill.
The missions are pretty straight forward with the typical "kill some rebels to help a minor foreign nation" theme.
This is a good enjoyable game.