Heal 20 guards.

Defeat Sewerjunk without damaging it with the Flamethrower.

Reach level 2.

Let SPLASH MIKE destroy all crates and trucks at the barracks.

Complete "In the Lion's Den".

Obtain Robert's photographs.

Complete "Welcome to the Jungle".

Complete "Boom Docks".

Kill 5 Human-Piranha-hybrid things with the shredders.

Break all toilet doors.

Neutralize 5 guards using the slingshot.

Complete "A Thousand Eyes Are Watching You".

Complete "Jerico's Heart".

Complete "Engineering Problems".

Complete "The Great Escape".

Find 15 secrets in the game.

Get the maximum experience possible in at least 5 chapters.

Reach level 10.

Put 20 guards to sleep.

Reach level 8.

Finish the game without using a potty.

Die while tampering with items from your inventory.

Destroy 5 drones by punching them.

Complete "Something Stinks Really Bad".

Complete "The Barracks".

Destroy 5 trucks in the barracks north parking lot before SPLASH MIKE does with his tank.

Craft a Molotov cocktail.

Destroy 9 mechanical spiders.

Finish the game on hard difficulty.

Complete the catacombs without destroying any cell gates.

Destroy General X's robo-tank without using electromagnetic grenades.

Defeat HUGEEL firing just 6 torpedoes.

Have 90 or more bullets at the same time.

Destroy 5 crates with the explosion of a single grenade.

Reach level 6.

Reach the ground floor in less than a minute when rushing to save the doctor.

Obtain 5 potties.

Defeat TAKUMA TAKAGASHI without letting him heal himself.

Reach level 4.

Finish the game.