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Underliner

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About Underliner

Underliner is an open-world puzzle adventure filled with puzzles and secrets. You solve puzzles by plotting a bullet’s route, choosing where it turns and calculating how other objects affect its path.

Plot the bullet’s path

Mirrors, walls and gates influence the bullet’s trajectory. You estimate the positions of objects and find the right sequence of turns and angles to solve each puzzle.

Explore the world

The world’s puzzles carry allegorical meanings and are intended to provoke your imagination.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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