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