There are 39 Bronze Trophies, 9 Silver Trophies, 2 Gold Trophies, and 1 Platinum Trophy for this title.

Bronze:

Auto Dealer
Objective: Kill 50 enemies with the sub-machinegun.

Bedlam Basher
Objective: Kill a Bandit from behind with a melee attack.

Blind Luck
Objective: Kill 25 enemies using blind fire.

Boom
Objective: Blow up 50 explosive objects.

Dances With Guns
Objective: Complete both nightclub encounters without any of the dance-bots being destroyed.

Death Hazard
Objective: Score 20 single-shot Zombie kills.

Deja-Vu
Objective: Defeat Sting Sniperscope again in Level 3.

Disco is Dead
Objective: Defeat Sonny Tang.

Draw
Objective: Kill 50 enemies with the Dual-Wield Six-Shooters.

Eat FIST!
Objective: Perform 10 single-hit melee kills.

Fire Hazard
Objective: Shoot and destroy 30 fire extinguishers.

Hands-On Approach
Objective: Defeat an enemy using melee combat.

Hazard Avoider
Objective: Complete the game on the Minor Hazard difficulty setting.

Head Cheese
Objective: Kill all enemies in the butcher shop with head shots.

Headache
Objective: Score 20 headshots.

Housing Crisis
Objective: Escape from Dexter's mansion.

It's HAZARD TIME!
Objective: Start your first game.

Maxx Karnage
Objective: Collect 20 Hazard pickups.

Meat Your Maker
Objective: Destroy all of the meat in the Level 2 meat locker.

Migraine
Objective: Score 50 headshots.

Multiplayer Master!
Objective: "What? No multiplayer? Sigh. Well...not like we can take the trophy back NOW..."

No Pain, No Gain
Objective: Kill an enemy with an explosive that also damages you.

Observe the Grenade
Objective: Kill 3 Tester employees with a single shot from the grenade launcher.

Peekaboo...I Shot You!
Objective: Kill 50 enemies with the Sniper Rifle.

Plink
Objective: Kill 50 enemies with the Hazard pistol.

Pull!
Objective: Kill 50 enemies with the shotgun.

Pure Energy
Objective: Kill 50 enemies with the Energy Pistol.

Russian Attack
Objective: Kill 50 enemies with the AK-47.

Russian to the Finish
Objective: Defeat General Neutronov.

Say "No" to Pots
Objective: Shoot 30 potted plants.

Second Amendment
Objective: Kill at least one enemy with every available gun.

Shield Master
Objective: Collect 20 Master Shield pickups.

Straight-A Student
Objective: Complete all of the in-game tutorials.

Stung
Objective: Defeat Sting Sniperscope.

Take 5.
Objective: Pause the game...