The Kinsano Leader Add-on for Halo Wars 2 has 3 achievements worth 30 gamerscore.
Kill 100 units with Inferno (Multiplayer, Skirmish or Blitz)
Win 3 matches as Morgan Kinsano (Multiplayer, Skirmish or Blitz)
Burn 50 infantry with Kinsano's Flamewall ability (Multiplayer, Skirmish or Blitz)