| Achievement | How to unlock
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| - Call in 2,000 waves early.
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| - Target and kill 5 enemies.
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| - Target and kill 50 enemies.
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| - Target and kill 200 enemies.
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| - Train a hero to level 10.
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| - Complete a level with under 5 lives 10 times.
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| - Complete a level with under 5 lives 50 times.
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| - Complete a level with under 5 lives 200 times.
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- #16 - Directed Current - Bronze
| - Kill 500 enemies with the Tesla Tower.
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- #17 - Directed Current - Silver
| - Kill 5,000 enemies with the Tesla Tower.
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- #18 - Directed Current - Gold
| - Kill 50,000 enemies with the Tesla Tower.
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- #19 - Graveyard Shift - Bronze
| - Collect 10,000 energy from enemy kills.
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- #20 - Graveyard Shift - Silver
| - Collect 125,000 energy from enemy kills.
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- #21 - Graveyard Shift - Gold
| - Collect 500,000 energy from enemy kills.
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- #22 - Starry Night - Bronze
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- #23 - Starry Night - Silver
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- #24 - Starry Night - Gold
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- #25 - Why Buy the Cow? - Bronze
| - Claim 10 free supply drops.
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- #26 - Why Buy the Cow? - Silver
| - Claim 30 free supply drops.
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- #27 - Why Buy the Cow? - Gold
| - Claim 100 free supply drops.
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- #28 - Well Connected - Bronze
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- #29 - Well Connected - Silver
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- #30 - Well Connected - Gold
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- #31 - Mad Scientist - Bronze
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- #32 - Mad Scientist - Silver
| - Obtain 25 tower upgrades.
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- #33 - Mad Scientist - Gold
| - Obtain 50 tower upgrades.
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- #34 - Helping Hand - Bronze
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- #35 - Helping Hand - Silver
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- #36 - Helping Hand - Gold
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- #37 - Cannon Fodder - Bronze
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- #38 - Cannon Fodder - Silver
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- #39 - Cannon Fodder - Gold
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- #40 - Artificial Selection - Bronze
| - Build 10 specialized towers.
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- #41 - Artificial Selection - Silver
| - Build 100 specialized towers.
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- #42 - Artificial Selection - Gold
| - Build 1,000 specialized towers.
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- #43 - Rail Blazer - Bronze
| - Kill 250 enemies with the railgun.
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- #44 - Rail Blazer - Silver
| - Kill 2,500 enemies with the railgun.
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| - Kill 25,000 enemies with the railgun.
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- #46 - Mind Your Step - Bronze
| - Kill 100 enemies with infantry mines.
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- #47 - Mind Your Step - Silver
| - Kill 1,000 enemies with infantry mines.
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- #48 - Mind Your Step - Gold
| - Kill 10,000 enemies with infantry mines.
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- #49 - Acidic Nature - Bronze
| - Kill 100 enemies with the caustic cloud.
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- #50 - Acidic Nature - Silver
| - Kill 1,000 enemies with the caustic cloud.
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- #51 - Acidic Nature - Gold
| - Kill 10,000 enemies with the caustic cloud.
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- #52 - Burn Notice - Bronze
| - Kill 250 enemies with fire.
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- #53 - Burn Notice - Silver
| - Kill 2,500 enemies with fire.
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| - Kill 25,000 enemies with fire.
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- #55 - Paint the Ground Red - Bronze
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- #56 - Paint the Ground Red - Silver
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- #57 - Paint the Ground Red - Gold
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- #58 - Call a Friend - Bronze
| - Call in 25 sets of reinforcements.
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- #59 - Call a Friend - Silver
| - Call in 100 sets of reinforcements.
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- #60 - Call a Friend - Gold
| - Call in 500 sets of reinforcements.
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- #61 - Melting Point - Bronze
| - Kill 250 enemies with the Plasma Cannon.
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- #62 - Melting Point - Silver
| - Kill 2,500 enemies with the Plasma Cannon.
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- #63 - Melting Point - Gold
| - Kill 25,000 enemies with the Plasma Cannon.
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- #64 - Would you kindly? - Bronze
| - Mind control a total of 100 enemies.
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- #65 - Would you kindly? - Silver
| - Mind control a total of 1,000 enemies.
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- #66 - Would you kindly? - Gold
| - Mind control a total of 10,000 enemies.
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- #67 - Confirmed Kills Only - Bronze
| - Kill 250 enemies with Vanguard soldiers.
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- #68 - Confirmed Kills Only - Silver
| - Kill 2,500 enemies with Vanguard soldiers.
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- #69 - Confirmed Kills Only - Gold
| - Kill 25,000 enemies with Vanguard soldiers.
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- #70 - Empty Shields - Bronze
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- #71 - Empty Shields - Silver
| - Thrown 2,500 EMP grenades.
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- #72 - Empty Shields - Gold
| - Thrown 25,000 EMP grenades.
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- #73 - Fistful of Bullets - Bronze
| - Kill 250 enemies with the Minigun.
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- #74 - Fistful of Bullets - Silver
| - Kill 2,500 enemies with the Minigun.
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- #75 - Fistful of Bullets - Gold
| - Kill 25,000 enemies with the Minigun.
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| - Kill 100 enemies with the Gunslinger.
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| - Kill 1,000 enemies with the Gunslinger.
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| - Kill 10,000 enemies with the Gunslinger.
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- #79 - Marvellous - Bronze
| - Kill 250 enemies with MARV.
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- #80 - Marvellous - Silver
| - Kill 2,500 enemies with MARV.
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| - Kill 25,000 enemies with MARV.
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- #82 - Starstruck - Bronze
| - Dizzy 250 enemies with the Concussion Grenade.
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- #83 - Starstruck - Silver
| - Dizzy 2,500 enemies with the Concussion Grenade.
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| - Dizzy 25,000 enemies with the Concussion Grenade.
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- #85 - Challenger - Bronze
| - Complete 10 Easy challenges.
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- #86 - Challenger - Silver
| - Complete 20 Easy challenges.
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Tip 5: Projectile weapons will not do much damage versus it if the enemy has a shield.
Tip 8: You can manage your heroes to kill enemies. You can likewise make gold with every enemy eliminated from heroes.
Tip 12: Call an ally to the chosen ground and help you in eliminating close-by enemies.
Tip 14: If your Tesla Tower is out of energy just immediately fill up by investing gems.
Tip 15: Equip your heroes with equipment to enhance it's protective and offending abilities.
