Here is the full list of all 12 Type:Rider achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Read all the books
Finish the secret level
Retrieve all asterisks
Collect all letters
Locate the eight hidden ampersands
Finish the game
Finish the Clarendon level without dying
Make seven wall jumps in a row
Make a 360° in the air
Find one ampersand
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Retrieve all six asterisks in one chapter