Here is the full list of all 20 Tiny Troopers 2 achievements.
Kill 100 plague chickens.
Use 5 different uniforms in battle.
Lose 5 troopers to mines.
Kill 50 enemies with airstrikes.
Upgrade one upgrade category to the maximum.
Get a full squad in the last zombie map.
Use an airstrike to kill 3 enemies.
Complete Operation 3.
Have at least 500,000 Command Points.
Your machine gunner has killed 50 enemies.
Destroy 10 tanks.
Use each heavy weapon in one mission.
Complete Operation 2.
Unlock the first gated area.
Complete Operation 1.
Order 10 packages from HQ.
Collect 25 Dog Tags.
Kill 100 enemies.
Fail the first mission.
Complete the tutorial.