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