| Achievement | How to unlock
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| #01 - Bring it - Bronze | Call in 10 waves early.
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| #02 - Bring it - Silver | Call in 500 waves early.
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| #03 - Bring it - Gold | Call in 2,000 waves early.
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| #04 - Director - Bronze | Target and kill 5 enemies.
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| #05 - Director - Silver | Target and kill 50 enemies.
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| #06 - Director - Gold | Target and kill 200 enemies.
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| #07 - Heroic - Bronze | Train a hero to level 2.
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| #08 - Heroic - Silver | Train a hero to level 5.
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| #09 - Heroic - Gold | Train a hero to level 10.
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| #10 - Grit - Bronze | Complete a level with under 5 lives 10 times.
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| #11 - Grit - Silver | Complete a level with under 5 lives 50 times.
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| #12 - Grit - Gold | Complete a level with under 5 lives 200 times.
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| #13 - Architect - Bronze | Build 300 Towers.
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| #14 - Architect - Silver | Build 1,500 Towers.
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| #15 - Architect - Gold | Build 5,000 Towers.
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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 | Collect 5 stars.
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| #23 - Starry Night - Silver | Collect 50 stars.
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| #24 - Starry Night - Gold | Collect 100 stars.
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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 | Make 5 friends.
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| #29 - Well Connected - Silver | Make 15 friends.
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| #30 - Well Connected - Gold | Make 30 friends.
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| #31 - Mad Scientist - Bronze | Obtain 5 tower upgrades.
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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 | Send 1 gift.
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| #35 - Helping Hand - Silver | Send 25 gifts.
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| #36 - Helping Hand - Gold | Send 75 gifts.
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| #37 - Cannon Fodder - Bronze | Kill 1,000 enemies.
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| #38 - Cannon Fodder - Silver | Kill 10,000 enemies.
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| #39 - Cannon Fodder - Gold | Kill 100,000 enemies.
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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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| #45 - Rail Blazer - Gold | 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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| #54 - Burn Notice - Gold | Kill 25,000 enemies with fire.
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| #55 - Paint the Ground Red - Bronze | Call in 25 airstrikes.
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| #56 - Paint the Ground Red - Silver | Call in 100 airstrikes.
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| #57 - Paint the Ground Red - Gold | Call in 500 airstrikes.
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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 | Thrown 250 EMP grenades.
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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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| #76 - High Noon - Bronze | Kill 100 enemies with the Gunslinger.
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| #77 - High Noon - Silver | Kill 1,000 enemies with the Gunslinger.
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| #78 - High Noon - Gold | 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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| #81 - Marvellous - Gold | 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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| #84 - Starstruck - Gold | 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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