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