Mobile horror has its own grammar. Most of it comes down to a confined space, a hostile presence that reacts to sound, and a handful of objects you need to find in the right order. The genre borrows heavily from the PC survival horror boom of the mid-2010s, when scares came from resource scarcity and audio cues rather than gore.

What makes these games stick is restraint. You get almost nothing: no weapon worth using, no map, no checkpoint generosity. The tension builds because the player understands the rules long before they understand the house.

Granny, listed in the Arcade category and published under the name DVloper, is one of the clearest examples of that design philosophy working on a small screen.