Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
A Chance of Rain (Silver)	Used geo-charges 10 times on a single level.
A Natural Disaster (Bronze)	Used all the different types of geo-charge on a level.
A Stingy Warrior (Bronze)	Sold 10 weapons on a single level.
An Important Position (Bronze)	Placed all types of weaponry accessible in the episode on a single tile.
An Impregnable Fortress (Silver)	Didn't let a single enemy reach the time machine throughout a level.
An Old Ruin (Bronze)	Completed a level without improving weaponry.
Butcher (Gold)	Destroyed 20,000 enemies throughout the entire game.
On the Edge (Silver)	Completed a level with the time machine's health below 10 points.
Palaeontologist (Silver)	Collected 10,000 bones in a single level.
Take your places! (Bronze)	Installed weapons on all the tiles accessible on a level.
The Best Place (Bronze)	Unlocked a tile for i-volve on any level.