Galaxies Puzzle Online

Galaxies is one of the classic one-player logic games in Simon Tatham's Portable Puzzle Collection. Divide the grid into rotationally symmetric regions each centred on a dot.

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Preparing the game board and controls.

Game Objective

Draw borders to split the grid into regions. Each region must contain exactly one dot, and that dot is the center of the region: if a square belongs to a dot, the square opposite it after a 180-degree turn around the dot must also belong to the same region.

Divide the grid into rotationally symmetric regions each centred on a dot.

How to Play

Click an edge between two squares to draw or remove a border.
A completed region that has one center dot and the correct symmetry is highlighted automatically.
You can right-drag from a dot to a square to mark that the square should belong to that dot's region.
These puzzles reward careful deduction more than speed. Start with the most constrained clues, eliminate impossible choices step by step, and avoid guessing unless the puzzle specifically calls for it.

Beginner Tips

Treat each dot as a center point. Add squares in symmetric pairs around it whenever possible.
A border is needed when two neighboring squares must belong to different dots.
Start near edges and crowded groups of dots, because there are fewer symmetric shapes that can fit there.

Official Rules

For the full original rules, examples, and advanced options, read Simon Tatham's official manual.

Read the official manual

Frequently Asked Questions

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Galaxies Puzzle Online

Frequently Asked Questions

How do you play Galaxies?

What is the goal in Galaxies?

Is Galaxies good for beginners?

Can I play Galaxies on mobile?

What should I do if I get stuck in Galaxies?

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