| 2 Bugs are Better Than 1 (10) | Win a Skirmish Game with Dual Scarabs |
| 24 Hours of Quality (20) | Play Halo Wars for at least 24 Total Hours |
| Adjudicate the Arbiter (30) | Complete the Campaign on Heroic Difficulty |
| Alas, Poor Andrew Thomas (5) | Collect your first Skull |
| Backscratcher (10) | Complete any Campaign Mission in Co-op Mode |
| Basically Naive (10) | Obtain the Recruit Rank on Xbox LIVE |
| Battened Down the Hatches (5) | Mission 11: Save all the Airlocks |
| Beaming with Pride (5) | Mission 13: Destroy 25 units with the Scarab |
| Big Al's Scooter (10) | Win a Heroic Skirmish Game against the AI in under 10 minutes |
| Covenant "Hot Drop" (5) | Mission 3: Kill at least 5 Covenant Units with the Bridge |
| Crushed Colors (10) | Improve your Score in any Campaign Mission |
| Detour the Great Journey (50) | Complete the Campaign on Legendary Difficulty |
| Didn't Get To Second Base (5) | Mission 14: Don't claim an extra base |
| Empire Builder (5) | Win a game in every Skirmish game mode |
| Endless Fun (5) | Mission 2: Destroy every Methane Tank |
| Epic Grinder (40) | Obtain a Lifetime Campaign Score over 1,000,000 |
| Everything's Better with Bacon (5) | Mission 1: Ram 50 Grunts with Warthogs |
| Gallivant around the Galaxy (25) | Win a game on every Skirmish Map |
| Graverobber (30) | Collect all Skulls |
| Halo Academic (15) | Unlock 20 Timeline Events |
| Halo Historian (40) | Unlock All Timeline Events |
| Handy with Tools (5) | Mission 12: Repair the Power Core in less than 4 minutes |
| He's Got The Jack (5) | Mission 5: Jack 6 Covenant Vehicles |
| Ice Warriors (40) | Completed Act I on any difficulty |
| Key to Pirth (50) | Completed Act II on any difficulty |
| Meet Sergeant Forge (10) | Completed Mission 1 on any difficulty |
| Micro Manager (5) | Mission 7: Do not destroy any Power Node |
| Momma's Boy (5) | Get a Gold Medal on any mission |
| Mr. Punctual (15) | Finish all missions under Par Time on Heroic difficulty |
| My Virtual Friends Love Me (10) | Win a 3v3 Skirmish game with 2 AI Allies |
| N00b n0 M0r3 (10) | Win a Matchmade Skirmish Game on Xbox LIVE |
| No Way Home? (70) | Completed Act IV on any difficulty |
| Officer on Deck (30) | Obtain the Lieutenant Rank on Xbox LIVE |
| OMG BFF FTW (40) | Complete entire Campaign in Co-op Mode |
| Own Worst Enemy (20) | Get a Gold Medal with all Debuff Skulls Active |
| Penny Pincher (10) | Get a winning High Score with 10 or less Squads against the Heroic AI |
| Playin' the Field (15) | Win a Skirmish Game with every Leader |
| Ramblin' Man (5) | Mission 8: Use Elephants to train 100 Infantry |
| Ready for the Sequel (75) | 100% Completion |
| Rhino Hugger (5) | Mission 6: Successfully protect every Rhino |
| Running the Show (50) | Obtain the General Rank on Xbox LIVE |
| So Lonely at the Top (20) | Win and have the Highest Score in a Matchmade Skirmish Game on Xbox LIVE |
| Sweet Naptime (5) | Mission 9: Put every Colony in Hibernation Mode at the same time |
| The Procrastinator (5) | Mission 10: Disrupt all Tractor Beams |
| The Real Winner (5) | Mission 4: Save Adam |
| Thinkin' about My Doorbell (5) | Mission 15: Open the Doors in order |
| Titan (15) | Get 20,000 points in any Skirmish Game |
| Ugly is only Skin Deep (70) | Completed Act III on any difficulty |
| Walk-Off Winner (30) | Use one of the 6 Major Leader Powers to destroy an enemy's last unit |
| Wall of Recognition (30) | Get a Gold Medal on every Campaign Mission |
