Complete the part "The great escape".
Complete the part "Something stinks really bad".
Complete the part "In the lion's den".
Complete the part "Welcome to the Jungle".
Complete the part "The barracks".
Complete the part "Engineering problems".
Complete the part "Boom docks".
Complete the part "A thousand eyes are watching you".
Complete the part "Jericho's heart".
Finish the game.
Reach level 2.
Reach level 4.
Reach level 6.
Reach level 8.
Reach level 10.
Obtain Robert's photographs.
Finish the game using no potty.
Neutralize 5 guards using the slingshot.
Heal 20 guards.
Sleep 20 guards.
Destroy 5 drones by punching them.
Destroy General X's robo-tank without using electromagnetic grenades.
Obtain 5 urinals.
Craft a Molotov cocktail.
Kill X Human-Piranha-hybrid things with the shredders.
Destroy 9 mechanic spiders.
Die while tempering with items from your inventory.
Destroy 5 trucks in the north parking lot at the barracks before Machine Mike does with his tank.
Complete the catacombs without destroying any cell gate.
Have 90 bullets or more.
Destroy 5 crates with a single grenade.
Find 15 secrets in the game.
Defeat SEWERJUNK without using the flamethrower.
Defeat TAKUMA TAKAGASHI without letting him heal himself.
Break all toilet doors.
Defeat HUGEEL firing just 6 torpedoes.
Let the tank destroys all crates and trucks at the barracks.
Reach the ground level in less than 1 minute when running to save the doctor.
Finish the game in hard mode.
Get the maximum experience possible in at least 5 chapters.