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.
Locate the eight hidden ampersands
Read all the books
Finish the secret level
Retrieve all asterisks
Collect all letters
Finish the game
Finish the Clarendon level without dying
Make a 360° in the air
Make seven wall jumps in a row
Find one ampersand
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Retrieve all six asterisks in one chapter