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