Halo Wars 2

Despite the achievement's description stating the Hunter Captain's ability must be used against vehicles, this achievement can be earned by simply using its ability a total of fifty times.

If you want to get this done quickly, head into a solo Skirmish matches against the AI on Easy and and make these setting changes:

• Gametype: Domination
• Starting Supply: 9999
• Starting Power: 9999
• Unit Ability Cooldown: 200%

Now choose Colony as your leader and begin the match (the map choice does not matter). Once the match starts, build a War Council and then build the Hunter Captain followed by its "Taunt" ability. With the Hunter Captain out on the battlefield, simply use its special ability by tapping while the unit is selected. It will take about twenty-five seconds for the ability to cool down, but once it does, use it again and again until the achievement finally unlocks.