Full list of all 75 Halo Wars: Definitive Edition achievements worth 1,500 gamerscore.
Achievements they've won
Achievements they've not won
Complete the Campaign on Legendary Difficulty.
Disrupt 5 active Leader Powers in a single game on Blood River.
Kill 20 enemy squads with a continuous Covenant Leader Power on Memorial Basin.
Get a Scarab during a Reinforcement game.
Score the winning point in a game of Keepaway against Legendary AI's.
Finish with 5000 net resources tributed to your teammates on Memorial Basin except in Deathmatch.
Gain at Least 15 population from a single wave in a Reinforcement game.
Hot drop 50 squads to your Covenant Leader in a single game on Barrens.
Get 20,000 points in any Skirmish Game.
Mission 1: Ram 50 Grunts with Warthogs.
Play Halo Wars for at least 24 Total hours.
Mission 14: Don't claim an extra base.
Win a Skirmish Game with Dual Scarabs.
Get a Gold Medal with all Debuff Skulls Active.
Collect all Skulls.
Mission 11: Save all the Airlocks.
Mission 2: Destroy every Methane Tank.
Unlock All Timeline Events.
Mission 5: Jack 6 Covenant Vehicles.
Mission 6: Successfully protect every Rhino.
Finish all missions under Par Time on Heroic difficulty.
Get a Gold Medal on every Campaign Mission.
Complete the Campaign on Heroic Difficulty.
Obtain a lifetime campaign Score over 1,000,000.
Mission 12: Repair the Power Core in less than 4 minutes.
Collect 8 Skulls.
Mission 10: Distrupt all Tractor Beams.
Mission 8: Use Elephants to train 100 infantry.
Mission 7: Do not destroy any Power Node.
Use one of the 6 Major Leader Powers to destroy an enemy's last unit.
Mission 9: Put every Colony in Hibernation Mode at the same time.
Mission 4: Save Adam.
Finish five missions under Par Time on Heroic difficulty.
Mission 3: Kill at least 5 Covenant Units with the Bridge.
Get a winning High Score with 10 or less Squads against the Heroic AI.
Win a Heroic Skirmish Game against the AI in under 10 minutes.
Win 100 Skirmish or Multiplayer Matches.
Win 75 Skirmish or Multiplayer Matches.
Win 50 Skirmish or Multiplayer Matches.
Win 40 Skirmish or Multiplayer Matches.
Win 30 Skirmish or Multiplayer Matches
Win a game in every Skirmish Game Mode.
Win and never trail in a Tug of War game.
Win a game on every Skirmish Map.
Win 20 Skirmish or Multiplayer Matches
Unlock 20 Timeline Events.
Win 10 Skirmish or Multiplayer Matches
Win a Skirmish Game with every Leader.
Collect your first Skull.
Improve your Score in any Campaign Mission.
Finish one mission under Par Time on Heroic difficulty.
Complete Mission 15 on any difficulty.
Mission 15: Open the Doors in order.
Complete Mission 14 on any difficulty.
Complete Mission 13 on any difficulty.
Mission 13: Destroy 25 units with the Scarab.
Complete Mission 12 on any difficulty.
Complete Mission 11 on any difficulty.
Complete Mission 10 on any difficulty.
Win a Public game.
Win and have the highest score in a Public Game.
Complete Mission 9 on any difficulty.
Complete Mission 8 on any difficulty.
Complete Mission 7 on any difficulty.
Complete Mission 6 on any difficulty.
Complete Mission 5 on any difficulty.
Complete any Campaign Mission in Co-op Mode.
Complete Mission 4 on any difficulty.
Unlock a Timeline Event.
Win a 3v3 Skirmish game with 2 AI Allies.
Complete Mission 3 on any difficulty.
Complete Mission 2 on any difficulty.
Get a Gold Medal on any mission.
Complete Mission 1 on any difficulty.