Here is the full list of all 40 Serious Sam 3: BFE trophies - there are 26 bronze, 9 silver, 4 gold and 1 platinum.
Decapitate a Khnum.
Complete any level in cooperative with at least 2 players.
Find Sam's classic outfit
Perform all possible finishing moves in the game.
Rip Scrapjack's head off.
Complete the single player campaign.
Awake the Guardian of Time.
Start the car.
Blow a Major Biomechanoid into pieces.
Use the Mutilator to surf after a Werebull.
Kill an enemy using the Mutilator.
Pierce 5 enemies with one Devastator round.
Power up the Timelock.
Kill 20 enemies with the Minigun without releasing the trigger.
Kill a Witch-Bride of Achriman.
Decipher an Egyptian text.
Gib 20 enemies from close range with a shotgun.
Solve the riddle of the Sphynx.
Defeat the spaceship.
Kill at least 5 headless kamikazes in one explosion.
Break 5 Arachnoid necks.
Smash 20 Kleers with the Sledgehammer.
Secure the bird.
Squash 10 Hatchling spiders.
Kill 3 enemies in one sprint with the Sledgehammer.
Tear off 10 Kleer heads.
Break 10 Soldier necks.
Rip 10 Juvenile spiders apart.
Rescue professor Stein. So to say.
Complete any level in single player.
Rip out 10 Rocketeer hearts.
Kill the kicked enemy while it is still in the air.
Remove 10 Gnaar eyes.
Kill an enemy with a gib torn from another enemy.
Unlock all trophies.
Complete the game in single player on unmodified serious difficulty.
Complete the game in single player in half the estimated time on each level
Decipher all Egyptian texts.
Find at least 50 secrets in single player.
Find all secrets in single player.