Here is the full list of all 38 Demolish & Build 3: Excavator Playground achievements.
Fall over.
Demolish the parking lot.
Complete the test track.
Drive over all ramps.
Drive through all bump tracks.
Demolish the shack.
Drive to the top platform.
Try all activities in a single playthrough.
Complete any activity at night.
Demolish a single parking segment without damaging any others.
Demolish more than 50% of parking lot structures.
Demolish more than 75% of parking lot structures.
Completely demolish the parking lot.
Demolish the parking lot in 2:20 minutes.
Drive through the parking lot.
Demolish the parking lot in first-person camera mode.
Demolish the shack without using the shears.
Break more than 50% of all wooden planks.
Break more than 75% of all wooden planks.
Break all wooden planks.
Demolish the shack in first-person camera mode.
Drive over the speed bumps in first-person camera mode.
Drive through all bump tracks in first-person camera mode.
Complete the large ramp without lifting the excavator.
Complete the test track in both directions.
Complete the test track in first-person camera mode.
Complete the test track without hitting the barriers.
Complete the test track without hitting the barriers in first-person camera mode.
Complete the test track while driving in reverse.
Demolish more than 50% of all track barriers.
Demolish more than 75% of all track barriers.
Demolish all track barriers.
Drive to the top platform and return.
Drive off the top platform.
Drive off the top platform and land on the tracks.
Drive to the top platform in first-person camera mode.
Return from the top platform in first-person camera mode.
Leave the playing area.