Here is the full list of all 28 Don't Knock Twice achievements.
Complete the game without lighting any wall candles.
Dunk the basketball.
Destroy all of the Russian dolls.
Find 100% of collectables in a single playthrough.
Find 100% of collectables.
Find all of the family photographs.
Find 80% of collectables.
Destroy a door handle.
Destroy half of the Russian dolls.
Find the axe.
Pot the black snooker ball.
Find 60% of collectables.
Find the flamethrower.
Read Jess' diary entries.
Find 40% of collectables.
Read Chloe's diary entries.
Feed the crow.
Destroy a Russian doll.
Light the candle.