Complete the following achievements to unlock Microsoft Gamerscore points.
| Achievement | How to unlock
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- 10.0 From the Judges (20 points)
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- 5 Shots, 5 Kills (20 points)
| - Do 5 consecutive headshots without reloading or taking damage.
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| - Unlock the entire game map.
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- Complexity Theory (10 points)
| - Level up to experience level 10.
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| - Collect all the gold bars.
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- From Alpha to Omega (10 points)
| - Complete the Omega Armor.
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- Gets Better With Age (50 points)
| - Complete the game with 8 Health Packs, 19 Grenade Packs, 20 Foam Packs and 9 Missile Packs.
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| - Knock back enemies 1000 meters total with melee attacks.
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- Hook, Line and Sinker (20 points)
| - Kill an enemy with the Hookshot.
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- Itsy Bitsy Spider (10 points)
| - Defeat a Spidertank by drowning it.
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- Let There Be Light (10 points)
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- Mutually Deterrent (20 points)
| - Collect all the missile packs.
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- Old Dog, New Tricks (10 points)
| - Perform each type of melee attack: Dropkick, Hanging Takedown, Drop-down Takedown, Double Takedown.
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- Roller Coaster (10 points)
| - Take 20 rides on the mine cart.
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| - Run 10 kilometers total in hyperspeed.
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- Spam in a Can (20 points)
| - Defeat an XOS-1 Soldier with the Inertial Element.
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- Speedy Delivery (30 points)
| - Complete the final fight in less than 1 minute 30 seconds..
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- Surface Tension (20 points)
| - Collect all the foam canisters.
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- The Bigger They Are (20 points)
| - Defeat a Devastator with a foam grenade.
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- The Whole 9 Yards (20 points)
| - Kill 200 soldiers with a gun emplacement.
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- This Side To Enemy (20 points)
| - Collect all the grenade packs.
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- Unrestricted Access (20 points)
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