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