| Achievement | How to unlock
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|---|
| 100 MORDEN Soldiers (15 points) | The 100 hiden MORDEN soldiers appear.
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| Frontal Attack (15 points) | Use a frontal attack to kill boss.
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| Metal Slug XX Master (50 points) | Clear all the missions without continue.
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| Mission 1 Clear (10 points) | Clear the 1st mission.
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| Mission 2 Clear (10 points) | Clear the 2nd mission.
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| Mission 3 Clear (10 points) | Clear the 3rd mission.
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| Mission 4 Clear (10 points) | Clear the 4th mission.
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| Mission 5 Clear (10 points) | Clear the 5th mission.
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| Mission 6 Clear (10 points) | Clear the 6th mission.
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| Mission 7 Clear (10 points) | Clear the 7th mission.
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| Mission All Clear (30 points) | Clear all the missions.
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| The Paths of Fate (20 points) | Find all the paths.
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