THE OTHER ONE (Entity.Kind.MIRROR)
After three loops a second one turns up, and it shares the first one's silhouette on
purpose — same height, same suit, same dark — so at range you cannot tell which you are
looking at. Its rules are the hunter's rules INVERTED:
hunter the other one
while watched frozen IT COMES
while unwatched it closes inert
noise hunts it deaf
correct play keep it in view LOOK AWAY
Every instinct the first one trains into you is the way the second one kills you, and
that is the entire design. The tells are close-range only and all wrong in the same
direction: head thrown back so it stares at the ceiling instead of you, arms raised, and
feet that never reach the carpet (Backrooms floats it 14 cm).
It also makes no static and doesn't breathe, so the only warning the tape gives for it
is the edge closing in — even while you are looking straight at it.
ONE THING PER LOOP (Backrooms._disturb)
Exactly one change per wrap. Never two. That constraint IS the effect: change nothing
and a loop is just a teleport, change several and it reads as a new room, which is the
opposite of what this place is for. One change means you are never sure whether you
noticed something or imagined it — and since the room is otherwise identical, when you
ARE sure it is worse.
Escalating: early loops shift a prop half a metre, turn one, or kill a bank of lights.
Later ones hang a totem that wasn't there, permanently reveal an object nobody dusted,
or put the hunter exactly where you were standing a moment ago.
The shift is half a metre, not one — a metre is enough to shove a neighbouring prop and
read as TWO changes, and it's too obvious anyway. Half is "…was that there?"
dev/probe_two.gd verifies the inversion with numbers (unwatched 0.00 m, watched 4.39 m,
noise heat 0.00) and that the disturbance fires per loop. Note the probe has to wait out
WRAP_COOLDOWN between laps or only the first wrap ever fires.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
