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