Here is the full list of all 10 Super Steampunk Pinball 2D achievements.
Collect all regular stickers!
Earn an extra ball
Climb 100m in the bonus round
Enter a secret code on the title screen. Here's your hint: "Who are you going to believe, me or your own eyes?"
Get to the bonus round!
I'm rich! I'm wealthy! I'm independent! I'm socially secure! Achieve a cumulative point total of 50,000,000 !!!
Baby's first cheev: launch a ball
Ultimate Pinball Mastery! Climb 200m in the bonus round.
Collect all shiny stickers! Such dedication! Such chutzpah! So much free time! Also, if you care about such things, this counts as "beating the game."
You'll know even less about how you get this achievement after you get it.