Complete the indicated task to unlock the achievement.

Achievement	How to unlock
2 Bugs are Better Than 1	Win a Skirmish Game with Dual Scarabs.
24 Hours of Quality	Play Halo Wars for at least 24 Total hours.
Adjudicate the Arbiter	Complete the Campaign on Heroic Difficulty.
Alas, Poor Andrew Thomas	Collect your first Skull.
Backscratcher	Complete any Campaign Mission in Co-op Mode.
Basically Naïve	Win 10 Skirmish or Multiplayer Matches
Battened Down the Hatches	Mission 11: Save all the Airlocks.
Beaming with Pride	Mission 13: Destroy 25 units with the Scarab.
Big Al's Scooter	Win a Heroic Skirmish Game against the AI in under 10 minutes.
Covenant "Hot Drop"	Mission 3: Kill at least 5 Covenant Units with the Bridge.
Crushed Colors	Improve your Score in any Campaign Mission.
Detour the Great Journey	Complete the Campaign on Legendary Difficulty.
Didn't Get to Second Base	Mission 14: Don't claim an extra base.
Don't Stop Me Now	Win 40 Skirmish or Multiplayer Matches.
Drain Cleaner	Kill 20 enemy squads with a continuous Covenant Leader Power on Memorial Basin.
Empire Builder	Win a game in every Skirmish Game Mode.
Endless Fun	Mission 2: Destroy every Methane Tank.
Epic Grinder	Obtain a lifetime campaign Score over 1,000,000.
Everything's Better with Bacon	Mission 1: Ram and kill 50 Grunts with Warthogs.
Freak on a Streak	Gain at Least 15 population from a single wave in a Reinforcement game.
Gallivant around the Galaxy	Win a game on every Skirmish Map.
Graverobber	Collect all Skulls.
Halo Academic	Unlock 20 Timeline Events.
Halo Historian	Unlock All Timeline Events.
Halo Undergraduate	Unlock a Timeline Event.
Handy with Tools	Mission 12: Repair the Power Core in less than 4 minutes.
Hardly Tardy	Finish five missions under Par Time on Heroic difficulty.
He's Got the Jack	Mission 5: Jack 6 Covenant Vehicles.
KillJoy	Disrupt 5 active Leader Powers in a single game on Blood River.
Living Loving Bug	Get a Scarab during a Reinforcement game.
Lovely Bunch of Coconuts	Collect 8 Skulls.
Maximum Effort	Win 50 Skirmish or Multiplayer Matches.
Micro Manager	Mission 7: Do not destroy any Power Node.
Momma's Boy	Get a Gold Medal on any mission.
Mr. Punctual	Finish all missions under Par Time on Heroic difficulty.
My Virtual Friends Love Me	Win a 3v3 Skirmish game with 2 AI Allies.
N00b n0 M0r3	Win a Public game.
Never Leave a Man Behind	Finish with 5000 net resources tributed to your teammates on Memorial Basin except in Deathmatch.
Officer on Deck	Win 20 Skirmish or Multiplayer Matches
One and Done	Score the winning point in a game of Keepaway against Legendary AI's.
Own Worst Enemy	Get a Gold Medal with all Debuff Skulls Active.
Penny Pincher	Get a winning High Score with 10 or less Squads against the Heroic AI.
Playin' the Field	Win a Skirmish Game with every Leader.
Pull Hard, Pull Deep	Win and never trail in a Tug of War game.
Racing the Clock	Finish one mission under Par Time on Heroic difficulty.
Ramblin' Man	Mission 8: Use Elephants to train 100 infantry.
Ready for the Sequel	100% Completion.
Rhino Hugger	Mission 6: Successfully protect every Rhino.
Running the Show	Win 30 Skirmish or Multiplayer Matches
So Lonely At the Top	Win and have the highest score in a Public Game.
Soldier of Ares	Win 75 Skirmish or Multiplayer Matches.
Sweet Naptime	Mission 9: Put every Colony in Hibernation Mode at the same time.
The Procrastinator	Mission 10: Distrupt all Tractor Beams.
The Real Winner	Mission 4: Save Adam.
Thinkin' about My Doorbell	Mission 15: Open the Doors in order.
Titan	Get 20,000 points in any Skirmish Game.
Tour Coming Through	Hot drop 50 squads to your Covenant Leader in a single game on Barrens.
Walk-off Winner	Use one of the 6 Major Leader Powers to destroy an enemy's last unit.
Wall of Recognition	Get a Gold Medal on every Campaign Mission.
Weapon of Zeus	Win 100 Skirmish or Multiplayer Matches.