Here is the full list of all 15 ZHEROS (EU) trophies - there are 8 bronze, 5 silver and 2 gold.
Destroy 300 Screenman enemies
Complete the first mission
Complete the game at the level of difficulty Normal
Complete the game at the level of difficulty Hard
Complete a level without using any medkit
Reach a 100 combo streak hitting the enemies without pauses longer than 2 seconds. Using your gun or shield breaks the combo streak
Deflect 100 bullets using the shield at the right time when the bullet is about to hit
Find all secret stars hidden in each level, there is a total of 18 stars
Buy all upgrades
Break an enemy guard 100 times blocking its attack right before being hit
Complete all the levels of the first world
Complete all the levels of the second world
Stop 20 Sven Enemies from trasforming
Complete the game defeating Dr.Vendetta
Deflect 50 bullets using the vehicle shield