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.
Die a total of 500 times.
Die a total of 250 times.
Experienced the rain mini game 100 times.
Get a score of 200 in a single game.
Die a total of 100 times.
Die with a score of 007 while only wearing the secret agent glasses.
Experience the world upside down in mlg mode.
Die while being 1m away from the finish in speedrun mode.
Die a total 50 times.
Complete your first speedrun.
Tried out practice mode
Found a way to get rid of the hammer.
Die without earning any points.
tried blocking the hammer with an umbrella.
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.