Skirmish Line achievements

Purchase a weapon upgrade for a soldier.

Kill an enemy soldier in melee combat.

Have one of your soldiers get set on fire by a burning object.

Complete the tutorial mission.

Experience a BANZAI wave!

Earn 15 ribbons and medals.

Successfully complete a campaign evaluation.

Set fire to 40 enemy soldiers.

Pick up 80 supply crates.

Earn 5 ribbons and medals.

Earn the Congressional Service Medal.

Reach wave 100 on every Challenge mode in Defense in Depth and Sector Defense missions.