Here is the full list of all 27 Pinball 2018 achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Unlock Pyramid obstacle
Unlock Elastic circle #2 obstacle
Unlock Central beam obstacle
Score 10 points
Collect Violet gem!
Unlock Circular arc obstacle
Unlock Big elastic triangle obstacle
Unlock Elastic circle #3 obstacle
Collect Blue gem!
Unlock Arc obstacle
Unlock Rotating beam #1 obstacle
Collect Aquamarine gem!
Unlock Small elastic triangle obstacle
Unlock Elastic circle #1 obstacle
Collect Yellow gem!
Collect Grey gem!
Unlock Rotating beam #2 obstacle
Lose a game by running out of time
Unlock Tunnel obstacle
Score 5 points
Collect Red gem!
Collect Green gem!
Collect Rose gem!
Unlock Left triangle obstacle
Lose a game by letting the ball to fall down
Collect Light Blue gem!
Unlock Right beam obstacle