Here is the full list of all 25 Sherlock Holmes: Crimes and Punishments Redux achievements worth 1,000 gamerscore.
Finish Black Peter case.
Finish Train case.
Finish Blood Bath case.
Finish Abbey Grange case.
Finish Kew Gardens case.
Finish Half Moon case.
Complete the game.
Beat Cairns in a fight.
Disarm Mexican by shooting the gun from his hand.
Retrieve the Golden Knife from the ancient temple of Mithras.
Save Crocker from committing suicide.
Prevent Miss White from suicide.
Catch the thieves at Notting Hill Manor.
Finish 25 mini games and puzzles without skipping.
Finish 35 mini games and puzzles without skipping.
Finish 45 mini games and puzzles without skipping.
Reach 6 correct conclusions for all 6 cases.
Reach all possible conclusions in the game.
Receive maximum personality ranking.
Finish 15 "Character Observations" without skipping.
Gather 26 Character Portraits.
Finish 10 Dialogue QTEs without a failure.
Receive 3 messages from those whom you condemned or absolved.
Interact with Toby in every case.
Collect all possible in-game achievements.