KNOCK KNOCK: How Rare Is It
What this page helps you decide: whether KNOCK KNOCK is worth going after, and how far into the game's difficulty curve it sits
KNOCK KNOCK is held by 0.9% of everyone who has played SILENT BREATH on Steam — about one player in 111. That makes it the 3rd hardest of the game's 32 achievements. Steam describes it as "Unlock the mysterious door". Below: how it compares with the achievements either side of it, where the real difficulty wall in this game sits, and what the percentage does and does not tell you.
How rare this actually is
0.9% of everyone who has played SILENT BREATH on Steam has this one, which is about one player in 111. That puts it 3rd hardest of the 32 achievements in the game. 2 achievements are rarer, and 29 are more common. For scale, the most common achievement in the game sits at 64.5% and the rarest at 0.1% — a spread of roughly 645 times between the two ends. The median achievement sits at 14.4%, so this one is in the harder half.
What sits either side of it
Just above it is MISSED CALL at 0.9% (about 1 in 111). Steam gives no description for that one either. Just below it is STORY UNTOLD at 0.5% (about 1 in 200). The step between them is 1.8x in players-per-unlock terms, which is the real measure of how much further you have to go.
Where the difficulty really jumps
The sharpest drop in the whole list is between STORY UNTOLD (0.5%) and FINAL ACT (0.1%) — completion falls by about 5x in a single step. That is where most players stop. This achievement sits before that wall, so it is part of what most players do finish.
Step-by-Step
- Read what Steam actually asks for: Unlock the mysterious door.
- Set expectations from the number: at 0.9%, roughly one player in 111 gets there.
- If you clear this, STORY UNTOLD at 0.5% is the next wall.
Data Tables
| Achievement | Global completion | Players per unlock | Position |
|---|---|---|---|
| THE DEAD DON'T MAKE NOISE | 64.5% | 1 in 2 | Most common |
| MISSED CALL | 0.9% | 1 in 111 | One step easier |
| KNOCK KNOCK | 0.9% | 1 in 111 | This page — 3rd hardest |
| STORY UNTOLD | 0.5% | 1 in 200 | One step harder |
| FINAL ACT | 0.1% | 1 in 1000 | Rarest in the game |
FAQ
How rare is KNOCK KNOCK in SILENT BREATH?
0.9% of Steam players have it — roughly one in 111. It is the 3rd hardest of the game's 32 achievements.
What do you have to do for KNOCK KNOCK?
Steam lists it as: Unlock the mysterious door
Is KNOCK KNOCK harder than STORY UNTOLD?
No — STORY UNTOLD is rarer at 0.5% against this one's 0.9%.
Sources
- Official SILENT BREATH global achievement stats (Steam) — Steam's own global completion percentages, captured 2026-08-28. The page declares 32 achievements and we parsed exactly 32, which is the check that the figures line up with the right names.