Completed the Campaign on Heroic Difficulty.

Completed the Campaign on Legendary Difficulty.

Got a Gold Medal on any mission.

Improved your Score in any Campaign Mission.

Finished all missions under Par Time on Heroic difficulty.

Got a Gold Medal with all Debuff Skulls Active.

Got a Gold Medal on every Campaign Mission.

Obtained a lifetime campaign Score over 1,000,000.

Mission 1: Rammed and killed 50 Grunts with Warthogs.

Mission 2: Destroyed every Methane Tank.

Mission 3: Killed at least 5 Covenant Units with the Bridge.

Mission 4: Saved Adam.

Mission 5: Jacked 6 Covenant Vehicles.

Mission 6: Successfully protected every Rhino.

Mission 7: Did not destroy any Power Node.

Mission 8: Used Elephants to train 100 infantry.

Mission 9: Every Colony put in Hibernation Mode at the same time.

Mission 10: Distrupted all Tractor Beams.

Mission 11: Saved all the Airlocks.

Mission 12: Repaired the Power Core in less than 4 minutes.

Mission 13: Destroyed 25 units with the Scarab.

Mission 14: Didn't claim an extra base.

Mission 15: Opened the Doors in order.

Collected all Skulls.

Scored the winning point in a game of Keepaway against Legendary AI's.

Won a Skirmish Game with every Leader.

Won a game on every Skirmish Map.

Won a game in every Skirmish Game Mode.

Got 20,000 points in any Skirmish Game.

Unlocked a Timeline Event.

Won a 3v3 Skirmish game with 2 AI Allies.

Used one of the 6 Major Leader Powers to destroy an enemy's last unit.

Won a Skirmish Game with Dual Scarabs.

Got a winning High Score with 10 or less Squads against the Heroic AI.

Unlock 20 Timeline Events.

Unlocked All Timeline Events.

100% Completion.

Played Halo Wars for at least 24 Total hours.

Won 10 Skirmish or Multiplayer Matches

Won 20 Skirmish or Multiplayer Matches

Won 30 Skirmish or Multiplayer Matches

Won 40 Skirmish or Multiplayer Matches.

Won 50 Skirmish or Multiplayer Matches.

Won and never trailed in a Tug of War game.

Finished five missions under Par Time on Heroic difficulty.

Won 100 Skirmish or Multiplayer Matches.

Collected 8 Skulls.

Won 75 Skirmish or Multiplayer Matches.

Finished one mission under Par Time on Heroic difficulty.

Got a Scarab during a Reinforcement game.

Gained at Least 15 population from a single wave in a Reinforcement game.

Finished with 5000 net resources tributed to your teammates on Memorial Basin except in Deathmatch.

Collected your first Skull.

Hot dropped 50 squads to your Covenant Leader in a single game on Barrens.

Killed 20 enemy squads with a continuous Covenant Leader Power on Memorial Basin.

Disrupted 5 active Leader Powers in a single game on Blood River.

Won a Heroic Skirmish Game against the AI in under 10 minutes.