Complete the indicated task to earn the corresponding amount of XP (brackets).

Air Strike (13,000):
Kill an enemy while in the air.

Assist (150):
Damage an enemy, a teammate then kills.

Back Off (6,600):
Kill an enemy who is melee attacking at close range.

Backfire (7,800):
Kill an enemy with their own explosive.

Backwhat? (3,200):
Kill an enemy that is wearing a backpack while you are not wearing one.

BBQ (17,500):
Hit 3 enemies simultaneously with the Arc Welder.

Beat Down (1,600):
Kill an enemy with a melee attack.

Blast (11,500):
Kill an enemy with an explosive barrel or tank.

Blindside (18,750):
Kill an enemy from behind.

Bullseye (7,200):
Kill an enemy with a direct rocket hit.

Camper (52,000):
Kill an enemy while standing still.

Charge (8,750):
Rhino charge through a wall and kill an enemy.

Crush (1,500):
Kill an enemy with building debris.

Death By Boundary (4,100):
Knock an enemy out of the level boundaries.

Death From Above (2,150):
Kill an enemy by thrusting down.

Death From Below (29,000):
Kill an enemy by thrusting up.

Doppleganger (38,000):
Kill an enemy that has the same backpack you do.

Dust Bunny (15,500):
Kill an enemy who is in mid-jump.

Flagman (12,200):
Kill an enemy with their team flag.

Full Control (5,400):
Fully repair a target.

Ghost Kill (7,000):
Kill a stealthed Enemy.

Good Timing (16,500):
Use the Rhino or Thrust pack to survive an attack.

Hail Mary (10,900):
Kill an enemy from far away without using a gun.

Headshot Kill (4,500):
Kill an enemy with a headshot.

Heal Teammate (325):
Restore at least half of a teammate's health.

Interceptor (10,600):
Kill a ragdolling enemy in mid-air.

Knockdown (3,650):
Knock down multiple enemies simultaneously with the concussion pack.

Lined Up (33,000):
Hit 2 or more enemies with one Rail Driver shot.

Mega Kill (5,800):
Kill multiple enemies within 3 seconds.

No Problem (56,000):
Kill an enemy while at full health.

Pack Hunter (550):
Be near a teammate when they kill an enemy.

Payback (20,250):
Exact revenge within 15 seconds of respawning.

Power Trip (9,500):
With Firepower active, kill an enemy with a melee weapon.

Rainbow Wars (31,000):
Kill an enemy that is using the Heal Pack.

Remote Save (2,300):
Kill an enemy before they can detonate a remote charge stuck to you or a teammate.

Rescue Kill (700):
Kill an enemy near a teammate that has been knocked down.

Shake It Up (14,200):
Kill an enemy while your Tremor pack is activated.

Sharpshooter (24,000):
Shoot and kill an enemy from far away.

Sleeper Kill (27,000):
Kill a fallen enemy with a melee attack.

Streak Stopper (1,800):
Kill an enemy who is unstoppable.

Stuck (4,400):
Detonate a remote charge stuck to an enemy.

Survivor (2,600):
Recover to full health after nearly dying.

Synchronized Kill (900):
Kill an enemy at the same time a nearby teammate does.

Unstopable (3,050):
Kill 5 or more enemies in a row.

Vendetta (1,200):
Kill an enemy who recently killed a teammate.

Vertigo (48,000):
Kill an enemy above or below you.

Who's #1 (5,000):
Kill the enemy with the highest number of kills.

X-Ray (22,500):
Kill an enemy through a wall with the Rail Driver.

You're Doing It Wrong! (8,250):
Kill an enemy with the Reconstructor.

Zombie Kill (44,000):
Kill an enemy from beyond the grave.

Complete the following tasks to unlock the corresponding equipment.

Unlock Ore Additive:
Have 2 Guerrilla Actions.

Unlock Proximity Mines:
Have 5 Guerrilla Actions.

Unlock Personnel Detector:
Have 8 Guerrilla Actions.

Unlock Grinder:
Have 12 Guerrilla Actions.

Unlock Quantum Multiplier:
Have 18 Guerrilla Actions.

Unlock Stonebreaker Sledgehammer:
Have 25 Guerrilla Actions.

Unlock Shattersmasher Sledgehammer:
Have 35 Guerrilla Actions.

Unlock Level 1 Armour and Rocket Launcher:
Liberate Parker sector.

Unlock Level 2 Armour:
Liberate Badlands sector.

Unlock Nano Forge and Guerrilla Express:
Liberate Dust sector.

Unlock Thermobaric Rocket:
Liberate Free Fire Zone sector.

Unlock Jetpack:
Liberate Oasis sector.

When you earn the indicated amount of Experience points the corresponding bonus will become an available option.

Playlist for Team Objective:
50 Experience Points

Alec Mason Character:
100 Experience Points

Badge Group - Guerrilla:
200 Experience Points

Playlist for Siege:
250 Experience Points

Rank 1 Badge:
400 Experience Points

Blair Character:
475 Experience Points

Large Mixer Playlist:
625 Experience Points

EDF Trooper Character:
800 Experience Points

Rank 2 Badge:
1,000 Experience Points

Dan Mason Character:
1,100 Experience Points

Color Group - Aqua:
1,300 Experience Points

Celia Character:
1,400 Experience Points

Badge Group - Weapons 1:
1,700 Experience Points

Pierce Character:
1,900 Experience Points

Rank 3 Badge:
2,000 Experience Points

Sledgehammer - Stonebreaker:
2,450 Experience Points

Color Group - Green:
2,750 Experience Points

Kat Character:
2,900 Experience Points

Rank 4 Badge:
3,500 Experience Points

Jackson Character:
3,350 Experience Points

Badge Group - Symbols:
3,800 Experience Points

Sledgehammer - Shattermaster:
3,950 Experience Points

Clark Character:
4,250 Experience Points

EDF Specialist Character:
4,700 Experience Points

Badge Group - Stars:
4,850 Experience Points

Color Group - Crimson:
5,200 Experience Points

Olga Character:
5,600 Experience Points

Rank 5 Badge:
6,000 Experience Points

Sledgehammer - Facecrusher:
6,200 Experience Points

Chuck Character:
6,400 Experience Points

Badge Group - EDF:
6,800 Experience Points

Selma Character:
7,400 Experience Points

Sledgehammer - Bronze Crusher:
7,600 Experience Points

Ian Character:
8,000 Experience Points

Red Color Group:
8,500 Experience Points

EDF Elite Character:
9,000 Experience Points

Sledgehammer - Silver Master:
9,250 Experience Points

Badge Group - Weapons 2:
9,750 Experience Points

Rank 6 Badge:
10,000 Experience Points

Color Group - Orange:
10,300 Experience Points

Kayla Character:
11,200 Experience Points

Sledgehammer - Gold Breaker:
11,800 Experience Points

Kepler Character:
12,600 Experience Points

Badge Group - Backpacks:
13,400 Experience Points

Rachel Character:
13,800 Experience Points

Sledgehammer - Titanium Hammer:
14,600 Experience Points

Rank 7 Badge:
15,000 Experience Points

Ravager Character:
16,000 Experience Points

Color Group - Tan:
17,000 Experience Points

Numah Character:
18,000 Experience Points

Sledgehammer - Skull Digger:
19,500 Experience Points

Krystal Character:
21,000 Experience Points

Sledgehammer - War Hammer:
21,750 Experience Points

Color Group - Yellow:
23,250 Experience Points

Rank 8 Badge:
25,000 Experience Points

Old Coot Character:
26,000 Experience Points

Sledgehammer - Battle Axe:
28,000 Experience Points

Badge Group - Volition:
30,000 Experience Points

Sledgehammer - Bloody Bat:
32,000 Experience Points

Scavenger Character:
34,000 Experience Points

Badge Group - Summoner:
36,000 Experience Points

Rank 9 Badge:
40,000 Experience Points

Color Group - Purple:
42,000 Experience Points

Sledgehammer - Stun Baton:
46,000 Experience Points

EDF Heavy Character:
50,000 Experience Points

Color Group - Rainbow:
54,000 Experience Points

Badge Group - Alter Echo:
58,000 Experience Points

Sledgehammer - Plastic:
60,000 Experience Points

RF Commander Character:
65,000 Experience Points

Badge Group - Marauder:
70,000 Experience Points

Rank 10 Badge:
75,000 Experience Points

Color Group - Silver:
85,000 Experience Points

Raider Character:
100,000 Experience Points

Sledgehammer - Ostrich:
120,000 Experience Points

Rank 11 Badge:
150,000 Experience Points

Listed below are the 16 hidden challenges in Multiplayer which can be completed in Matchmaking, Custom Matches, or a combination of both modes. Use the 'Statistics' view to see where you are for ALL of these and not the 'Leaderboards'. 6 of the challenges must be achieved in one life while the others are overall.

1 Life: 10 Kills - 1 Weapon:
Kill 10 people with the same weapon in one life.

1 Life: 15 Bonuses:
Get 15 different bonuses in one life.

1 Life: 25 Bonus XP:
Gain 25 bonus XP in one life.

1 Life: 5 XP - 5 Backpacks:
Get 5 XP with 5 different backpacks in one life.

1 Life: 50 XP:
Gain 50 XP in one life.

1 Life: Kill - 5 Weapons:
Kill 5 people with 5 different weapons in one life.

10 Kills - Every Weapon:
Kill 10 players with each individual weapon.

10 Wins - Every Game:
Type Win 10 matches in every game type.

100 Wins:
Win 100 matches (any mode).

100 XP - Every Backpack:
Gain 100 XP with each individual backpack.

100 XP - Every Weapon:
Gain 100 XP with each individual weapon.

1000 Kills - 1 Weapon:
Kill 1,000 players with one weapon.

5 XP - Every Bonus Event:
Gain 5 XP with each bonus event.

500 XP - 1 Bonus Event:
Gain 500 XP with one bonus event.

5000 XP - 1 Backpack:
Gain 5,000 XP with one backpack.

5,000 XP - 1 Weapon:
Gain 5,000 XP.

At the 'Main' menu select 'Options' and then 'Extras' and enter the following codes without the quotes to enable the corresponding feature.

Bonus Multiplayer Map Pack featuring 4 Maps
Enter 'MAPMAYHEM'

Unlock Golden Sledgehammer (Single-Player):
Enter 'HARDHITTER'

The following cheats become available options when you get the indicated Achievement (brackets). If you choose to activate cheats the Achievements feature will become disabled.

No Green Alert (One Man Army Achievement):

Unlimited Ammo (Freed Space Achievement):
Infinite ammo for ALL weapons.

Cool Turrets (Tank Buster Achievement):
Turrets do not overheat.

Free Upgrade (Freedom Fighter Achievement):
Upgrades at the safehouse are free.

Max Morale (Don't Tread On Me Achievement):
Max morale in ALL sectors.

Super Sprinting (Working The Land Achievment):
Player runs at 1.5x normal speed while sprinting.

Max Technology (Red Dawn Achievement):
EDF/Guerilla/Marauder always have best armor and weapons.

Super Debris (Coming Down Achievement):
ALL explosive damage and damage from collisions is tripled.

Super Hammer (Best Friends Forever Achievement):
Makes your sledgehammer super strong.

This tough setting becomes an available feature when you have beaten the campaign on any difficulty setting.