| Achievement | How to unlock
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| 2 Bugs are Better Than 1 (10 points) | Win a Skirmish Game with Dual Scarabs.
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| 24 Hours of Quality (20 points) | Play Halo Wars for at least 24 Total Hours.
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| Adjudicate the Arbiter (30 points) | Complete the Campaign on Heroic Difficulty.
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| Alas, Poor Andrew Thomas (5 points) | Collect your first Skull.
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| Backscratcher (10 points) | Complete any Campaign Mission in Co-op Mode.
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| Basically Naive (10 points) | Obtain the Recruit Rank on Xbox LIVE.
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| Battened Down the Hatches (5 points) | Mission 11: Save all the Airlocks.
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| Beaming with Pride (5 points) | Mission 13: Destroy 25 units with the Scarab.
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| Big Al's Scooter (10 points) | Win a Heroic Skirmish Game against the AI in under 10 minutes.
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| Covenant "Hot Drop" (5 points) | Mission 3: Kill at least 5 Covenant Units with the Bridge.
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| Crushed Colors (10 points) | Improve your Score in any Campaign Mission.
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| Detour the Great Journey (50 points) | Complete the Campaign on Legendary Difficulty.
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| Didn't Get To Second Base (5 points) | Mission 14: Don't claim an extra base.
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| Empire Builder (5 points) | Win a game in every Skirmish Game Mode.
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| Endless Fun (5 points) | Mission 2: Destroy every Methane Tank.
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| Epic Grinder (40 points) | Obtain a Lifetime Campaign Score over 1,000,000.
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| Everything's Better with Bacon (5 points) | Mission 1: Ram 50 Grunts with Warthogs.
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| Gallivant around the Galaxy (25 points) | Win a game on every Skirmish Map.
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| Graverobber (30 points) | Collect all Skulls.
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| Halo Academic (15 points) | Unlock 20 Timeline Events.
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| Halo Historian (40 points) | Unlock All Timeline Events.
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| Handy with Tools (5 points) | Mission 12: Repair the Power Core in less than 4 minutes.
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| He's Got The Jack (5 points) | Mission 5: Jack 6 Covenant Vehicles.
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| Micro Manager (5 points) | Mission 7: Do not destroy any Power Node.
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| Momma's Boy (5 points) | Get a Gold Medal on any mission.
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| Mr. Punctual (15 points) | Finish all missions under Par Time on Heroic difficulty.
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| My Virtual Friends Love Me (10 points) | Win a 3v3 Skirmish game with 2 AI Allies.
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| N00b n0 M0r3 (10 points) | Win a Matchmade Skirmish Game on Xbox LIVE.
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| Officer on Deck (30 points) | Obtain the Lieutenant Rank on Xbox LIVE.
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| OMG BFF FTW (40 points) | Complete entire Campaign in Co-op Mode.
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| Own Worst Enemy (20 points) | Get a Gold Medal with all Debuff Skulls Active.
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| Penny Pincher (10 points) | Get a winning High Score with 10 or less Squads against the Heroic AI.
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| Playin' the Field (15 points) | Win a Skirmish Game with every Leader.
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| Ramblin' Man (5 points) | Mission 8: Use Elephants to train 100 Infantry.
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| Ready for the Sequel (75 points) | 100% Completion.
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| Rhino Hugger (5 points) | Mission 6: Successfully protect every Rhino.
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| Running the Show (50 points) | Obtain the General Rank on Xbox LIVE.
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| So Lonely at the Top (20 points) | Win and have the Highest Score in a Matchmade Skirmish Game on Xbox LIVE.
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| Sweet Naptime (5 points) | Mission 9: Put every Colony in Hibernation Mode at the same time.
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| The Procrastinator (5 points) | Mission 10: Disrupt all Tractor Beams.
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| The Real Winner (5 points) | Mission 4: Save Adam.
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| Thinkin' about My Doorbell (5 points) | Mission 15: Open the Doors in order.
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| Titan (15 points) | Get 20,000 points in any Skirmish Game.
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| Walk-Off Winner (30 points) | Use one of the 6 Major Leader Powers to destroy an enemy's last unit.
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| Wall of Recognition (30 points) | Get a Gold Medal on every Campaign Mission.
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| Black Box | How to unlock
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|---|
| All Others | Win on each Skirmish map and win Skirmish with each leader
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| Black Box 01 - Alpha Base | Under the last bridge before entering Alpha Base
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| Black Box 02 - Relic Approach | Top left of the map, behind a Covenant shield
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| Black Box 03 - Relic Interior | On the small ramp on the left side right at the start, before going inside the Relic
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| Black Box 04 - Arcadia City | Just north of the starting point, right next to the skyscraper where you can save Adam
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| Black Box 05 - Arcadia Outskirts | Go down the first ramp as you are fleeing from the Covenant, it's behind a downed Pelican
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| Black Box 06 - Dome of Light | Far left of the map, to the left of where you transport the third Rhino tank
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| Black Box 07 - Scarab | Far right side of the map, in a small alcove with supply crates
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| Black Box 08 - Ander' Signal | Near the big brute fire line at the start, on a ridge to the right
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| Black Box 09 - The Flood | Straight out from the base ramp on the other side of the map
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| Black Box 10 - Shield World | Alongside Bravo platoon, which is the middle platoon you pick up
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| Black Box 11 - Cleansing | Left rear of the ship, on wings that slant down...you'll need a flying unit
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| Black Box 12 - Repairs | Left edge of Spirit of Fire, not far from the Power Core building, on the left side
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| Black Box 13 - Beachhead | On a ledge near the second set of teleporters, near the Covenant base
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| Black Box 14 - Reactor | Up and left at the top of the first ramp, on the edge of the ramp
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| Black Box 15 - Escape | Directly opposite the starting point on the north edge of the map, between the Flood and the Covenant base
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