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