The Mech Land Assault Add-on for Just Cause 3 has 6 achievements.
Beat the last mission of the Mech Land Assault Expansion and complete the story arc.
Earn at least 1 Gear in all Challenges of the Mech Land Assault Expansion.
Earn 5 Gears in all Challenges of the Mech Land Assault Expansion.
Destroy 30 enemy vehicles using the Mech's Force Pulse.
Liberate 3 Detention Camps.
Hijack your first Mech.