Here is the full list of all 20 Alpha Runner achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Experienced the rain mini game 100 times.
Died over 1000 Times.
Die a total of 500 times.
Die a total of 250 times.
Get a score of 200 in a single game.
Die a total of 100 times.
tried blocking the hammer with an umbrella.
Die a total 50 times.
Die with a score of 007 while only wearing the secret agent glasses.
Tried out practice mode
Found a way to get rid of the hammer.
Experience the world upside down in mlg mode.
Complete your first speedrun.
Die while being 1m away from the finish in speedrun mode.
Die without earning any points.
Die for the first time.
Get a score of 10 in one game.
Jump 10 times in one game.
Earn your first point.
Actually you started the game. Thank you for playing.