Halo Wars
58 Achievements
1,200
82-104h
Xbox 360
Xbox One
Xbox Series
Ice Warriors
Completed Act I on any difficulty Details for this achievement will be revealed once unlocked
40
How to unlock the Ice Warriors achievement in Halo Wars - Definitive Guide
I don't know if there was a glitch when I got this, but I had to finish the 4th mission to get the achievement. The name of the mission is Arcadia City.
Complete missions 1, 2 and 3.