Halo Wars 2

This achievement is very simple as it does not involve winning Blitz matches; completing matches is sufficient enough. If you want to get this out of the way quickly and don't mind losing (or bringing down your teammates), you can jump into a 2v2 match and simply leave your Units idled at Home Base. Your opponent will likely capture all three Zones during this time and the match will end within three or four minutes.

If you want to win, though, try searching for a 2v2 or 3v3 match and employ the general guidelines outlined in the "Duellist" achievement above. If played out to their fullest, Blitz matches typically last ten to fifteen minutes; it'll be rare if they take any longer. Once you have completed 25 Blitz matches, the achievement will unlock.