| Achievement | How to unlock
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| Ambush | Set up 15 simultaneously active claymore mines.
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| Barrier | Survive for 30 waves in Tactical Mode on the Prison map.
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| Blast | In one game kill 12 bosses with inventory landmines.
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| Bullet Proof | In one game survive 25 missile hits from a Rotor Boss.
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| Burst | In a game kill 3 Mortar Bosses with Grenade Sentry guns.
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| Cash Grab | In one game pick up 25000 coins from dead enemies.
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| Close Call | During Bullet Time, kill 5 Suiciders with the Steam Hammer.
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| Combat | In Tactical Mode, in a single wave kill 3 melee bosses in a row.
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| Commander | Reach the Commander Player Rank.
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| Dangerous Game | In a game get damaged by 20 Demolition or Chainsaw Boss melee hits.
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| Defenseless | Survive 20 minutes on Shipwreck without building anything.
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| Detonate | Explode 500 suicide bombers.
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| Drone Strike | In a game kill 2 bosses during a single Ghost powerup.
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| Exploder | In a game blow up 10 gas cannisters dropped by dead suiciders.
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| Fire Storm | In a game use Cluster Bombs to kill 150 enemies.
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| Frenzied | Pick up an AK47, get Rage Trigger + Frenzy and kill 123 enemies during Rage.
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| Grenadier | In a game kill 100 suiciders using grenade sentries.
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| Guns Pointed Low | In a game survive for 10 minutes without using any ranged weapon.
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| Hammer Twins | Kill 2 Demolition Bosses within 60 seconds of each other.
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| I Can Take It! | In one game get hit by every boss type.
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| IED | In a game pick up and detonate 10 ieds.
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| Intruder | On Campsite map survive 10 minutes without a regular enemy reaching the tent.
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| Jack In The Box | In a game explode 21 flares using Payload.
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| KillStreak100 | Kill 100 enemies without taking any damage.
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| KillStreak1000 | Kill 1000 enemies without taking any damage.
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| KillStreak250 | Kill 250 enemies without taking any damage.
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| KillStreak500 | Kill 500 enemies without taking any damage.
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| Machine Gun Rage | Use the M1919 Machine Gun to kill 5 bosses during Rage powerups in one game.
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| Massacre | In a single wave, kill 250 enemies using explosions.
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| Master | Reach the Master Player Rank.
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| NoFlyZone | In a game kill 5 Rotor Bosses while they are flying.
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| Random Squad | In a public on-line game reach wave 20.
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| Remote Lethal | In a game kill 3 Flamer Bosses with a M2 Weapon Station.
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| Scorched | In a game get damaged by 5 Flamer Boss death explosions.
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| SemiPro | Reach the Veteran Player Rank.
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| Sentry | In a game deploy one sentry gun and let it kill 666 enemies.
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| Serial Kill | Without taking damage, kill 1000 enemies within the first 6 minutes of a game.
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| ShellShock | In a game kill 1000 enemies using shotgun sentries.
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| Suicidal | In a game get damaged by 10 suiciders.
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| Support Gunner | In one game kill 500 enemies using the M1919 Machine Gun during Bullet Time.
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| Tank | In a game kill 3 Tank Bosses.
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| Team Squad | In a friends on-line game reach wave 30.
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| Terrorist Tendencies | In a game stock handgrenades, pick only Anarchist then kill 1500 inside 10 minutes.
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| The First 300 | Kill 300 enemies in the first 3 minutes of a game.
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| Turning Pro | Reach the Captain player rank.
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| Underdog | Survive 5 minutes without killing any boss.
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| Vandalism | During the building phase, destroy 5 items created by another player.
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| Warlord | Reach the Warlord Player Rank.
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| We Need War | In a Coop game kill 2500 + 25 bosses. Kills count with your health 75%+.
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| You Need War | In a SP game kill 2000 + 20 bosses. Kills count with your health 75%+.
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