Here is the full list of all 12 Ugly Americans: Apocalypsegeddon trophies - there are 7 bronze, 4 silver and 1 gold.
Resuscitate 50 allies.
Complete the game in an online multiplayer session.
Complete all levels without using special attacks.
Complete the game using any character.
Collect all the projectiles.
Kill 5000 Demons.
Use any special attack 100 times.
Locate and collect all of the Demon Babies.
Kill 1000 Manbirds.
Rack up a 20 score multiplier.
Kill 300 Zombies.
Defeat 50 enemies in a row without getting hit.