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