Here is the full list of all 35 Alien Breed Episode 3: Descent trophies - there are 16 bronze, 14 silver, 4 gold and 1 platinum.
Each and every trophy has been awarded. Congratulations!
Complete 'Vengeance' single player level on Veteran mode in 17 minutes or less.
Stay alive for 8 minutes or better on any of the Survivor mode single player levels.
Achieve a time of 8 minutes or better on any multiplayer survivor map.
Kill 250 aliens on any of the Survivor mode multi player levels.
Complete the prologue, all single player, co-op assault and survivor maps on any difficulty.
Take 500 damage without dying on 'Determination' single player mission.
Complete any co-op assault map over PlayStation®Network.
Complete any multiplayer level.
Complete any single player level using only the Blaster and Grenades.
Complete the prologue in single player on any difficulty level.
Find all 'secret' collectibles.
Complete all single player levels 1-5.
Complete all single player levels 1-5 on elite difficulty.
Destroy the alien queen.
Kill 20 aliens with one sentry gun.
Collect all logs through out the game.
Locate the bodies of Vance and Barnes.
Kill 5 aliens with one shot of Project X (in single player).
Purchase any item upgrade (in single player).
Finish any level with five Sentry guns in your inventory.
Kill 1000 aliens in single player.
Sell any item (in single player).
Use a Stun Grenade to stun 5 aliens at the same time (in single player).
Collect 50 items or weapons from human corpses (in single player).
Access the map screen (in single player).
Kill Mia.
Complete any single player level with the waypoints turned off.
Purchase any weapon upgrade (in single player).
Smash 10 windows (in single player).
Kill a sentry gun with the Blaster.
Use a Frag Grenade to kill 5 aliens at the same time (in single player).
Kill 3 burster aliens with one melee attack (in single player).
Kill a stunned alien with a Frag Grenade (in single player).
Kill an alien egg using the melee attack (in single player).