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 Tunnel obstacle
Unlock Elastic circle #3 obstacle
Score 10 points
Unlock Arc obstacle
Unlock Right beam obstacle
Unlock Big elastic triangle obstacle
Unlock Circular arc obstacle
Score 5 points
Collect Blue gem!
Unlock Elastic circle #2 obstacle
Unlock Central beam obstacle
Unlock Small elastic triangle obstacle
Lose a game by running out of time
Collect Grey gem!
Collect Aquamarine gem!
Collect Yellow gem!
Collect Red gem!
Collect Violet gem!
Unlock Left triangle obstacle
Collect Rose gem!
Unlock Elastic circle #1 obstacle
Collect Light Blue gem!
Collect Green gem!
Unlock Rotating beam #1 obstacle
Unlock Rotating beam #2 obstacle
Lose a game by letting the ball to fall down
Unlock Pyramid obstacle