Here is the full list of all 20 The Bridge achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Finish Mirrored Chapter I.
Finish Mirrored Chapter II.
Finish Mirrored Chapter III.
Finish Mirrored Chapter IV.
Complete The Intersection without walking.
Complete The Precipice without rotating.
Collect all hidden wisps.
Cross The Bridge.
Complete all mirrored worlds.
Complete The Mirrored Garden with 5 inversions.
Catch the unchained key in The Mirrored Courtyard.
Finish Chapter IV.
Finish Chapter III.
Complete The Corridor with 3 inversions.
Complete The Aftermath with 2 inversions.
Finish Chapter II.
Complete The Timepiece in less than 1 minute.
Complete The Library being no louder than a whisper.
Fall for 30 seconds.
Finish Chapter I.