hidden oxygen

Hidden Oxygen

Browser (desktop-only), App Store(Android)

Hidden Oxygen is a logical grid-based puzzle game that is inspired by Sudoku. You need to figure out the correct placements of oxygen atoms.

Oxygen atoms cannot be adjacent to each other, even diagonally

Numbers next to rows and columns tell how many oxygens should be in them

Each carbon atom needs 2 adjacent oxygens

June 2020 (Android). November 2020 (WebGL).

Meek Bits developed this game.

Click once to change state

Click and drag to mark multiple cells as empty

Zoom with mouse scroll wheel

Pan with right button