The Grid Detective

Logic deduction on PC

The Grid Detective is a logic deduction game built around fictional hacker-noir case files. You mark each cell in a grid True or False, using the clues to find the one valid solution. Cases are checked to have exactly one solution, and every answer can be reached through logic rather than guesswork.

Case Files and difficulty

The main Case Files mode gives you unlimited practice on 4x4 and 5x5 grids, alongside a 10-level Difficulty Ladder. Its clues introduce different ways of reasoning as you advance: later puzzles include statements where exactly two of three are true, and clues about which items sit immediately next to one another. The ladder changes the reasoning methods, not just the grid size.