Here is the full list of all 19 WW2: Bunker Simulator achievements.
Kill 5 enemies with an ax.
Kill 25 enemies with a pistol.
Search 100 bodies.
Kill 50 enemies with the machine gun.
Search 25 bodies.
Complete the tutorial.
Search 5 bodies.
Kill 50 enemies with a pistol.
Kill 250 enemies with a pistol.
Kill 150 enemies with the machine gun.
Kill 600 enemies with the machine gun.
Destroy 10 enemy planes.
Destroy 40 enemy planes.
Destroy 150 enemy planes.
Destroy 5 enemy tanks.
Destroy 25 enemy tanks.
Destroy 75 enemy tanks.
Kill 25 enemies with an ax.
Kill 100 enemies with an ax.