A psychological horror built on restraint rather than jump scares. It gets under your skin early and refuses to leave.
The best horror understands that fear lives in anticipation, and Ghostline is a study in exactly that. It almost never reaches for a jump scare. Instead it builds dread through sound, silence and the awful patience of a house that seems to be listening back to you.
A few puzzles are more obtuse than they need to be, and the third act sags a little, but the overall craft is remarkable. Play it alone, at night, with headphones — and regret nothing except having done so.