Here is the full list of all 42 Invasion of Barbarians achievements.
Finish the first level.
Finish the second level.
Finish the third level
Finish the fourth level
Finish the fifth level
Finish the sixth level
Finish the seventh level
Losing in the war.
Kill 100 enemies.
Kill 250 enemies.
Kill 450 enemies.
Kill 600 enemies.
Kill 1000 enemies.
Finish the level with less than 20% health points.
Hero dodged 30 times.
Parry 30 hit times.
Destroy a total of 30 boxes and barrels.
Learn 11 talents in the branch "Shooting".
Learn 11 talents in the branch "Survival".
Learn 11 talents in the branch "Trick".
To kill the first ogre.
Your barricade is destroyed.
The ability to "Explosive critical hit" worked.
Get 7 blows to the head.
The ability to "play with death" worked.
The ability to "Character Midas" worked.
Total collected 400 Metal.
Total collected 400 Skin.
Total collected 400 Cloths.
Complete any level without mercenaries, except the first.
Hiring more than 250 mercenaries.
Shoot more than 2000 times.
Traded more than 100 units of resources.
Shoot over 150 "cold" arrows.
Shoot over 150 fire arrows.
Risen more than 5 times per level.
Use more than 15 smoke bombs.
Make more than 400 attacks in close combat.
More than 20 mercenaries at the same time.
The time in the game more than 150 minutes.
Education completed.
Collected more than 15,000 gold per game.