Complete the indicated task to unlock the achievement.
Achievement | How to unlock
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Chapter1 | Pass "Chapter1".
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Chapter2 | Pass "Chapter2"
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Chapter3 | Pass "Chapter3"
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Chapter4 | Pass "Chapter4"
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Chapter5 | Pass "Chapter5"
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Chapter6 | Pass "Chapter6".
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Chapter7 | Pass "Chapter7".
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Chapter8 | Pass "Chapter8".
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Chapter9 | Pass "Chapter9".
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Getting ready! | Be ready to join the battle and start a new game.
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Thank you! | Have a quick look at the credits.
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WarOver | Finish the entire campaign.
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Zombie20 | Reach wave 20 while playing the zombie mode.
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Zombie5 | Reach wave 5 while playing the zombie mode.
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