| Weapons | How to unlock
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|---|
| 2nd level Assault Rifle | Box in Mission 5
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| 2nd level Grenades | Clear Missions 1, 2 and 3 in Normal difficulty (S rank)
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| 2nd level Rocket Launcher | Clear Missions 9, 10 and 11 in Normal difficulty (S rank)
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| 2nd level Shotgun | Box in Mission 11
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| 2nd level SMG | Box in Mission 3
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| 2nd level Whip | Clear Missions 5, 6 and 7 in Normal difficulty (S rank)
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| 3rd level Assault Rifle | Beat the game in Ultra difficulty
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| 3rd level Grenades | Clear Missions from 1 to 8 in Hard difficulty (S rank)
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| 3rd level Rocket Launcher | Clear Missions from 1 to 12 in Ultra difficulty (S rank)
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| 3rd level Shotgun | Beat the game in Expert difficulty
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| 3rd level SMG | Beat the game in Hard difficulty
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| 3rd level Whip | Clear Missions from 1 to 8 in Expert difficulty (S rank)
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