Abyss Sweeper is a free online puzzle game that flips the classic Minesweeper formula on its head – instead of avoiding mines, you need to hunt and harvest them to keep your drilling craft alive. You pilot a specialized rig descending through an endless grid of rock and volatile energy, using numbered tile clues to locate dangerous cells and make split-second decisions between digging safely or going for a risky harvest.

What makes Abyss Sweeper genuinely tricky is the fuel mechanic. Your tank drains constantly, so passive play gets you killed just as fast as hitting a mine unintentionally. Every run demands you balance careful deduction with aggressive harvesting – tap tiles to clear safe ground, long-press confirmed mine locations to grab fuel, and keep one eye on your hull integrity at all times. The infinite descent means no two runs play out the same, and the pressure compounds the deeper you go.

If you enjoy free online brain puzzle games, logic challenges, or grid-based strategy games without downloads, Abyss Sweeper delivers a tense, replayable experience that rewards sharp thinking over luck. Fans of classic Minesweeper games online, infinite survival puzzles, and 2D logic games will find plenty to love here. It's one of those free puzzle games you can jump into for five minutes and still be playing thirty minutes later.