Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Dead...again (Bronze)	Achieve your first instant kill on a zombie.
Discoverer I (Bronze)	Enter La Vendida Island.
Discoverer II (Bronze)	Enter La Sonada Island.
Discoverer III (Bronze)	Enter Santa Barbara Island.
Easy survival (Silver)	Complete the story mode in "Normal" difficulty.
Four-handed massacre (Bronze)	Complete a local or online challenge with another player.
Herbalist (Bronze)	Find the 20 special plants of the Herbarium.
Level Up (Bronze)	Unlock your first skill.
Perfect run (Silver)	Complete a challenge with a "S" ranking.
Picky monkeys (Silver)	Complete the 12 secondary quests of Kovac's monkeys.
Survival veteran (Silver)	Reach "Survival hobbyist" online ranking tag.
Unbreakable (Gold)	Complete the story mode in "Iron Man" difficulty.