Here is the full list of all 16 CountryBalls Heroes achievements.
Win USA Campaign
Win a regular game as Polandball
Win a regular game as Germany
Win a regular game as UK
Complete Tutorial
Win a regular game as China
Win a regular game as USA
Win Polish Campaign
Deal more than 9000 damage
Win a regular game as Poland
Win 250 Games
Win 100 Games
Win a regular game as Russia
Win 1 Games
Win 10 Games
Kill one unit