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