I've just recently bought a PSP and Killzone Liberation is one of the first few games that I have played and what can I say... As yet ,I have not finished the game - I've only completed about 10 per cent,but there's so much detail in it. Scenes are nicely drawn; the figures are small but drawn in good detail. The gun shots are meaty and realistic - try playing the game with a decent pair of head phones on and you'll see what I mean,good sound separation and clarity. As a strategic shooter there are ample weapons and ammunition as you move along in the game, you just have to know what to use and when as you can only carry one weapon at a time as well as one explosive device.
Enjoy ...

This game is excellent, based on four chapters with a fifth you can download (tried and failed?) Great array of weapons and auto save function is great so you don't have to start a mission again from the beginning. Found the chapter 2 boss infuriating as tried about 40 times to kill him. Level 4 boss was lots easier! Kept me interested though.

This game is tough thats whats good it will take hours of your life and you won't regret it i love this game but still falls short of Crisis Core - Final Fantasy