The Hivebusters Add-on for Gears 5 has 15 achievements.
Activated Keegan, Lahni and Mac's Abilities in the Hivebuster Campaign Expansion
Killed 50 enemies using Lahni's Electroblade Ability in the Hivebuster Campaign Expansion as Lahni
Killed 50 enemies through your Barrier Ability in the Hivebuster Campaign Expansion as Mac
Activated Resupply ability 25 times in the Hivebuster Campaign Expansion as Keegan
Completed all Chapters of the Hivebusters DLC (any difficulty)
Completed all Chapters of the Hivebusters DLC on Insane
Found all Character Ability upgrades in the Hivebusters DLC
Completed the Hivebusters DLC in 3-Player Co-Op (Scorpio squad, dupes not allowed)
Collect all Campaign Collectibles in the Hivebusters DLC