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