| Achievement | How to unlock
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|---|
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| |
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| - Upgrade a Laser Tower to Level 7
|
| - Score a x50 Multiplier Bonus from a Creep
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| - Beat 9 Easy Levels without losing a life on any (excluding endless Levels)
|
| |
| - Upgrade a Vortex Tower to Level 7
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| - Upgrade a Blaster Tower to level 7
|
|
| - Beat 9 Hard Levels without losing a single life (excluding endless Levels)
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| |
| - Beat 9 Medium Levels without losing a single life (excluding endless Levels)
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| |
| - Upgrade a Missile Tower to Level 7
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| - Upgrade a Shock Tower to Level 7
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| - Place every type of Turret in a single Level and win
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