Nightwatch: Logic Puzzles

Nightwatch is a calm light up logic puzzle set in a small town after dark. Place a lantern in every courtyard, light every square, and the sleeping town wakes around you. A fresh puzzle waits every night.

Four rules:
• Every courtyard needs exactly one lantern.
• Light travels along its row and column until a wall stops it.
• No two lights may shine on each other.
• Every square must end up lit.
That is the whole game, and every round has one right answer.

It is a variant of the classic Light Up / Akari puzzle, known as Regional Akari, with coloured courtyards in place of numbered walls. If you like Light Up or Akari puzzles, the courtyards are the twist. Every board can be worked out from what is on the screen, step by step, never by a guess.

Past nights wait in the archive, and every streak starts with two spare nights in hand. Seventy campaign rounds climb from five-by-five yards to nine-by-nine streets across five districts, from First Rounds to The Long Night and the journey's finale. Earn lanterns as you play: Next lanterns shows the closest one and how to get it. Free play holds hundreds more boards: gentle, tricky or deep.

Hints teach before they tell. The first two are always free: one names the technique the board is asking for, the next shows the squares it acts on. A third points to one square that has to hold a light and gives you the deduction that proves it. Undo is always to hand.

This logic puzzle plays offline: tonight's round, your saves and the first two hints never need a network, and there is no account and no sign-in. Your progress lives on your device.

Nightwatch is free, and ads pay for it. A short full-screen ad can show between campaign rounds and between free-play boards, as you leave a won board or start the next one after reopening the app: never before your third win, never on tonight's round, never the moment the app opens, never while you play, and never more than twenty in one day. Two more ads are yours to choose, and you can always say no: one lends you a lantern for a day, and one opens the third hint on the board you are solving. That hint is free on tonight's round, free twice in one night when no ad can play, and always free with Premium. Ads need a connection; offline, play simply carries on. A one-time purchase, Nightwatch Premium, turns every ad off. The Ramparts, thirty extra boards on the town's old walls, are a separate one-time purchase; Premium does not include them, and every other round stays free.