Complete the indicated task to complete the indicated challenge. Available challenges can be viewed on the "Information" screen.

Challenge	How to unlock
Arm and Wire Action	Leap Up!: Perform a leap up.
Arm and Wire Action	Barrage: Kill 3 enemies at the same time with a death from above.
Arm and Wire Action	Feel the beat, y'all!: Kill 30 grunts in hand-to-hand.
Arm and Wire Action	First Swing: Perform a swing.
Arm and Wire Action	Hand-To-Hand: Kill a grunt in hand-to-hand combat.
Arm and Wire Action	Incoming!: Kill an enemy with a death from above.
Arm and Wire Action	Jabberman: Kill 10 grunts in hand-to-hand combat.
Arm and Wire Action	Kick In The Back: Perform 2 zip kicks on an enemy.
Arm and Wire Action	Monkeyman: Swing longer than 30 meters without touching anything.
Arm and Wire Action	Pull!: Kill an airborne enemy with a throw attack.
Arm and Wire Action	Receiving End: Throw an object at an enemy.
Arm and Wire Action	Reel In: Reel in 3 times.
Arm and Wire Action	Speed Swinger: Complete 5 consecutive speed swings.
Arm and Wire Action	Swinger: Complete 3 consecutive swings.
Arm and Wire Action	The Pinball Effect: Kill 2 enemies with one throw.
Arm and Wire Action	The Pitcher: Kill 50 enemies with the throw attack.
Arm and Wire Action	Train Block: Pull down the vehicle that is blocking your way.
Arm and Wire Action	Train Wreck: Pull down 3 train cars.
Arm and Wire Action	Worthy foe: Kill 3 biomech in hand-to-hand combat.
Enemy Combat	Anti-Air Measures!: Destroy 1 polycraft.
Enemy Combat	Biomech Sweeper: Defeat 15 biomechs.
Enemy Combat	Blood Trial: Kill 10 grunts.
Enemy Combat	Cracker: Defeat 5 biomechs.
Enemy Combat	Fair Fight!: Defeat 1 biomech.
Enemy Combat	Headshot Bonanza: Kill 50 grunts with a headshot.
Enemy Combat	Nemesis: Kill 350 grunts.
Enemy Combat	Poly Cruncher: Destroy 10 polycraft.
Enemy Combat	Slayer: Kill 25 enemy grunts.
Enemy Combat	The bold approach: Hit 1 biomech with a single death from above.
Enemy Combat	Torn Into Pieces: While in the air, destroy 1 polycraft.
Weapon Usage	Air To Surface: Use the Tarantula to kill 6 enemies while swinging.
Weapon Usage	Close up: Shoot an enemy while zoomed in.
Weapon Usage	Drive By: Kill 3 grunts with the hiker while swinging.
Weapon Usage	Explosive Delivery: Kill 2 grunts with the bulldog while swinging.
Weapon Usage	Kaboom: Use a grenade to kill a grunt.
Weapon Usage	Let The Dog Out: Kill 3 grunts with one bulldog shot.
Weapon Usage	Man Locked Up: Use the Tarantula's lock-on ability to kill 1 infantry unit.
Weapon Usage	Rocket Man: Use the Tarantula to kill 10 enemies.
Weapon Usage	Stroke Of Luck: Kill 1 enemy by using the bulldog.
Weapon Usage	The River: Kill 5 grunts with a single grenade.
Weapon Usage	The Turn: Kill 4 grunts with a single grenade.
Weapon Usage	Two Hit Wonder: Kill 2 guards with a single hiker shot.