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