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