Here is the full list of all 8 WW2 Rebuilder: Germany Prologue achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Complete the level with five stars
Decorate the city
Find all secrets
Put bricks on a boat and transport them to the other side.
Build up a pulpit
Put the bell on the tower
Clean up destroyed building with buldozer
Eat an apple