After beating the true final boss, you'll unlock a series of four gauntlet-style special missions. They feature many more enemies than those found it the regular stages, combined layouts of certain stages, and lack checkpoints.
| Mission | How to unlock
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|---|
| Special Mission 1 | Beat the true final boss.
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| Special Mission 2 | Beat the true final boss.
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| Special Mission 3 | Beat the true final boss.
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| Special Mission 4 | Beat the true final boss.
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