Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Archaeologist (Gold)	Finding all Nahirg treasures.
As if you owned the place (Bronze)	Completing the Nahirg's base level.
Avalanche! (Bronze)	Use rock spikes to kill 50 enemies.
Frisbee player (Bronze)	Killing 100 enemies with the blade launcher.
I feel the power (Silver)	Reach Zack's suit level 20.
Ice cream man (Bronze)	Use frozen air to freeze 50 enemies.
Nothing can stop me (Bronze)	Finish the game in any difficulty level.
Rocky (Bronze)	Use the power of your rock punch to kill 50 enemies.
Space adventurer (Bronze)	Finishing the outside of the Nahirg's planet level.
Spider killer (Bronze)	Finishing the cave level.
This is getting hot (Bronze)	Finishing the rock and lava cave level.
Toaster (Bronze)	Kill 100 enemies using the flame thrower.
Treasure finder (Bronze)	Find 5 nahirg treasures.
Variety is the spice of life (Bronze)	Kill 50 enemies using each of Zack's powers.
You can't scare me (Bronze)	Killing a Nahirg general using only the blade launcher.