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