| Achievement | How to unlock
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| Alpha and Omega | Complete the campaign on Cruel & Unusual with 3 stars.
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| Doggone It | Kill 5 dogs with your mower within 1 second in the campaign.
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| Don't Get Cawky | Kill two birds with one rocket in the campaign.
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| Dreaded Judge | Complete the campaign on Executioner with 3 stars.
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| Executed | Complete the campaign on Executioner difficulty.
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| Gopher The Win | Kill 5 gophers simultaneously with a rocket in the campaign.
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| Gophigure | Kill an NPC mower by having them run into a gopher in the campaign.
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| Punisher | Complete the campaign on Cruel & Unusual difficulty.
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| There Can Be Only One | Kill an NPC mower on Cruel & Unusual difficulty.
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| When Mowers Collide | Kill two NPC mowers by making them collide in the campaign.
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