Here is the full list of all 30 Ironcast achievements.
Destroy 100 enemies across all campaigns
Deal 100,000 damage across all campaigns
Equip a systems augmentation in all available slots in a single campaign
Reach Global Unlock level 20
Gain 10,000 War Assets across all campaigns
Spend 50,000 scrap across all campaigns
Defeat Commandant René Durant
Keep both Shields and Drives active for 5 turns
Reach Global Unlock level 10
Match 20 or more nodes in a single chain
Equip an Ironcast ability in all available slots in a single campaign
Match 2 Overdrive nodes at the same time
Kill an enemy with a weapon fired on Overdrive
Kill 3 Enemies in one mission
Equip a rare system
Your Ironcast has been destroyed by overheating damage
Fire your weapons 6 times in one turn
Equip a passive augmentation in all available slots in a single campaign
Create a match chain with 4 different types of node
Complete a Battle mission without taking any damage
Reach Global Unlock level 30
Reach Global Unlock level 40
Defeat the final threat facing Britain
Complete 100 missions across all campaigns
Upgrade an Ironcast to over 1,250 HP in a single campaign
Match 2,000 nodes in a single campaign
Win a Battle mission without using any defences
Win a Survival mission without attacking any enemy
Equip a MKIII or higher system on all four slots in a single campaign
Win a Battle with less than 5% health left