| Achievement | How to unlock
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| - Defeat 1,000,000 fieldrunners.
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| - Get to round 100 on Crossroads in Classic mode on Medium.
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| - Get to round 100 on Crossroads in Classic mode on Hard.
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| - Defeat 500,000 fieldrunners.
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| - Fully upgrade a Missile Tower.
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| - Get to round 100 on Frostbite in Classic mode on Easy.
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| - Get to round 100 on Drylands in Classic mode on Easy.
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| - Get to round 100 on Grasslands in Classic mode on Easy.
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| - Get to round 100 on Skyway in Classic mode on Easy.
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| - Get to round 100 on Crossroads in Classic mode on Easy.
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| - Get to round 100 on Crossroads in Extended mode on Easy.
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| - Get to round 100 on Crossroads in Extended mode on Hard.
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| - Get to round 100 on Crossroads in Extended mode on Medium.
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| - Get to round 100 on Crystal Caves in Extended mode on Easy.
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| - Get to round 100 on Crystal Caves in Extended mode on Hard.
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| - Get to round 100 on Crystal Caves in Extended mode on Medium.
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| - Get to round 100 on Crystal Caves in Classic mode on Easy.
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| - Get to round 100 on Crystal Caves in Classic mode on Hard.
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| - Fully upgrade a Laser Tower.
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| - Get to round 150 on any map in Endless mode on Hard.
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| - Get to round 100 on Drylands in Classic mode on Medium.
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| - Get to round 100 on Drylands in Classic mode on Hard.
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| - Get to round 100 on Crystal Caves in Classic mode on Medium.
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| - Play 75 rounds consecutively with 1 life.
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| - Get to round 100 on Drylands in Extended mode on Easy.
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| - Get to round 100 on Drylands in Extended mode on Hard.
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| - Get to round 100 on Drylands in Extended mode on Medium.
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| - Get to round 100 on Grasslands in Classic mode on Medium.
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| - Get to round 100 on Grasslands in Classic mode on Hard.
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| - Get to round 100 on Lavaflow in Classic mode on Easy.
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| - Get to round 100 on Lavaflow in Classic mode on Medium.
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| - Achieve victory without taking any damage.
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| - Get to round 100 on Frostbite in Extended mode on Easy.
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| - Get to round 100 on Frostbite in Extended mode on Hard.
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| - Get to round 100 on Frostbite in Extended mode on Medium.
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| - Fully upgrade a Shotgun Tower
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| - Fully upgrade a Flame Tower.
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| - Get to round 100 on Grasslands in Extended mode on Easy.
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| - Get to round 100 on Grasslands in Extended mode on Hard.
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| - Get to round 100 on Grasslands in Extended mode on Medium.
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| - Buy and sell 20 towers consecutively.
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| - Fully upgrade a Poison Tower.
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- I Love the Smell of Napalm...
| - Defeat 5,000 fieldrunners with the Flame Tower.
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| - Get to round 100 on Frostbite in Classic mode on Medium.
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| - Get to round 100 on Frostbite in Classic mode on Hard.
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| - Get to round 500 on any map in Endless mode on Easy.
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| - Score 500,000 points on any map in a single session.
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| - Get to round 150 on any map in Endless mode on Easy.
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| - Slow down 100,000 fieldrunners with the Goo Tower.
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| - Get to round 100 on Lavaflow in Extended mode on Easy.
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| - Get to round 100 on Lavaflow in Extended mode on Hard.
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| - Get to round 100 on Lavaflow in Extended mode on Medium.
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| - Get to round 100 on Lavaflow in Classic mode on Hard.
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| - Get defeated 1,000 times.
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| - Fully upgrade a Tesla Tower.
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| - Fully upgrade a Mortar Tower.
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| - Score 850,000 points on any map in a single session.
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| - Unlock 50%% of all achievements.
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| - Fully upgrade a Gatling Tower.
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| - Get to round 100 on Mudslide in Classic mode on Easy.
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| - Get to round 100 on Mudslide in Classic mode on Hard.
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| - Get to round 100 on Mudslide in Extended mode on Easy.
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| - Get to round 100 on Mudslide in Extended mode on Hard.
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| - Get to round 100 on Mudslide in Extended mode on Medium.
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| - Get to round 100 on Mudslide in Classic mode on Medium.
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| - Defeat 5,000 fieldrunners.
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| - Defeat 15,000 fieldrunners with the Mortar Tower.
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| - Fully upgrade an Ice Tower.
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| - Slow down 50,000 fieldrunners with the Ice Tower.
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| - Survive any map with only 1 life.
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| - Get to round 100 on Skyway in Classic mode on Medium.
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| - Get to round 100 on Skyway in Classic mode on Hard.
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| - Get to round 100 on Skyway in Extended mode on Easy.
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| - Get to round 100 on Skyway in Extended mode on Hard.
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| - Get to round 100 on Skyway in Extended mode on Medium.
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| - Defeat 5,000 fieldrunners with the Laser Tower.
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| - Fully upgrade a Goo Tower.
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| - Fully upgrade a Plasma Tower.
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| - Defeat 100,000 fieldrunners.
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| - Get to round 250 on any map in Endless mode on Medium.
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| - Fully upgrade a Lava Tower.
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- They Keep Coming, I Keep Gunning
| - Defeat 25,000 fieldrunners.
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| - Achieve 100 victories without losing any lives.
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| - Get to round 250 on any map in Endless mode on Easy.
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| - Score 100,000 points on any map in a single session.
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