Here is the full list of all 25 Iron Harvest achievements.
Defeat 100 units with a Flamethrower squad.
Acquire 100000 Iron in total.
Construct 100 structures.
Win a match by earning enough Victory Points.
Win a match with a Victory Point outcome of 500:0.
Revive a hero 3 times in the same mission.
Revive a hero.
Play your first match in multiplayer.
Win a match by destroying all enemy HQs.
Win a match without ever retreating or reinforcing.
Build a Tur, Gulyay-Gorod, or Kaiser.
Kill 100 enemy heroes.
Attain elite rank with one of your units.
Acquire 100000 Oil in total.
Harvest 500 wrecks.
Pick up 1000 pieces of equipment.
Reinforce 5000 soldiers in total.
Retreat with 1000 units in total.
Destroy 50 enemy bunkers in total.
Build 1000 mechs.
Play 500 Matches or Missions in total.
Conquer 1000 resource points.
Destroy 1000 enemy mechs.
Collect 1000 resource stockpiles.
Win 100 Skirmish Matches.