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Alien Tears
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Earn a gold medal on all missions in the Story mode.
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Annihilator
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Kill 10,000 aliens.
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Arsenal
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Build 20 towers in one mission.
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Base Defender
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Complete the Story mode.
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Boot Camp
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Finish the first 3 missions.
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Burn Baby Burn
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Build 5 Inferno towers.
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Circular Hazard
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Earn a gold medal on the Campaign mode of Risk Exposure and Roundabout.
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Civil Divergence
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Earn a gold medal on the Campaign mode of Urban Planning and Tactical Diversion.
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Close Call
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Save a core less than 10 seconds away from the map exit.
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Combat Turmoil
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Earn a gold medal on the Campaign mode of Service Interruption and Height of Confusion.
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Confident
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Use speed up controls for a total of 30 seconds in any one mission.
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Death From Above
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Fire the orbital laser.
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Diversity
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Build all tower types in one mission.
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Eradicator
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Kill 100 aliens.
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Exterminator
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Destroy 1000 aliens.
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Few and Proud
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Volunteered to take part and completed the mission! You may now recruit another group.
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Field Promotion
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Earn at least one silver medal.
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Field Promotion
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Earn at least one silver medal.
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Filthy Rich
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Win with 10,000 resources remaining.
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Firebug
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Beat an advanced mission with only Inferno towers.
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First Blood
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Kill 1 alien.
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Flawless Victory
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Earn at least one gold medal.
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Full Defense
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Build 50 towers in one mission.
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Full House
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Build all upgrades of all tower types in one mission.
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Full Potential
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Beat an advanced mission with only level 3 towers and no selling.
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Great Ball of Fire
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Build 5 Meteor towers.
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Gun Crazy
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Beat an advanced mission with only Gun towers.
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Happy Returns
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Recover a loose core.
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Head Trauma
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Build 5 Concussion towers.
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Hey! That's mine!
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Kill an alien carrying a power core.
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High Voltage
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Build 5 Tesla towers.
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I Spy
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Activate reconnaissance system.
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Indecisive
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Sell 10 towers in a single mission.
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Kaboom!
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Build 5 Cannon towers.
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Leadhead
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Build 5 Gun towers.
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Liquidator
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Sell 5 towers.
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Master Strategist
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Earn a gold medal on all Challenge modes.
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Minimalist
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Beat an advanced mission with only level 1 towers.
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Nail Biter
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Win mission with the last core less than 10 seconds away from the map exit.
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No Sale
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No towers sold in a single mission.
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Not So Fast
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Build 5 Temporal towers.
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Out of Bullets
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Beat all 5 "Out of Bullets" challenge modes without using Gun or Cannon towers.
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Overflowing
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Earn a gold medal on all the modes of Overflow.
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Overseer
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Build 5 Command towers.
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Penny Pincher
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Win with 5,000 resources remaining.
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Pew Pew
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Build 5 Laser towers.
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Planet Defender
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Earn a silver medal on all missions in the Story mode.
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Power Builder
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Build 6 towers within 10 seconds.
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Pyrrhic Victory
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Shoot down flying alien carrying a core.
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Regional Deluge
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Earn a gold medal on the Campaign mode of Kill Zone and Overflow.
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Relay Race
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Witness 1 core handed off 10 times within 20 seconds.
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Retry
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Reload an earlier save checkpoint.
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Salvage Rights
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Destroy at least one boss alien.
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Sharpshooter
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Shoot down a flying alien.
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Shell-shocked
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Beat an advanced mission with only Cannon towers.
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Siege Breaker
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Survive 100 waves on the Grinder challenge mode.
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Surplus
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Win with 1,000 resources remaining.
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The Long Road
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Alien time until exit exceeds 5 minutes.
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The Not-So-Friendly Skies
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Build 5 Missile towers.
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Top of the Class
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Earn a gold medal on all the modes of Tony's Training and C.H.A.S.
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Tower Expert
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Build every tower and upgrade.
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Untouchable
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Beat an advanced mission with zero cores captured.
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Well Invested
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Gain 10000 resources from interest in a single mission.
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What IS that?
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Inspect 10 aliens.
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Xenocide
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Kill 50,000 aliens.
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Yellow Beats Green
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Upgrade a tower.
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