Nullheist

Nullheist is a stealth puzzle played one tile at a time. You move. They move. End a turn inside a beam of light and the job is over. Fifteen hand-built rooms, every one open from the first launch. Guards walk straight lines and turn when a wall stops them. Sentries stand still and sweep a quarter turn each move. Their sight is a cone four tiles deep. Walls throw solid shadow. Learn the rhythm, find the gap, walk through it. The rooms bring more than guards. Keys open locked doors and the doors stay open. Lockers hide you for one turn, then the door creaks. Glass breaks underfoot and every guard within earshot leaves his route to look, which is either a disaster or the plan. Open the vault first. The exit does not wake up until you do. Every job has a par: the fewest moves that clear it, proved by the solver built into the game. Match it for three stars. Undo is free and unlimited, so a mistake costs a tap, not a restart. Whisper asks the solver for the next move from wherever you stand. It never lies. It never explains. Draw your own rooms in the blueprint editor. Paint walls, doors, glass, lockers, patrols and sentries on a grid up to twelve by fourteen. Tap Check and the solver either sets a par or tells you exactly what is wrong: two exits, no vault, no clean route. Then run it and earn stars on it like any other job. Progress, records and blueprints live in one file on the device. Nothing is sent anywhere. There is no sign-in, no advertising, no purchase inside the app and no clock running. iPhone and iPad, portrait or landscape.