2048

Each turn, you swipe a grid of tiles — up, down, left, right — and every matching pair merges into their sum. A 2 meets a 2 and becomes a 4. That 4 finds another 4 and becomes an 8. The board fills faster than you expect, and suddenly you're managing a traffic jam of numbers, trying to keep space open while nudging that elusive 2048 tile into the corner where you can protect it.

It sounds simple because the rules are simple. The strategy, though, runs surprisingly deep. Players who've spent hours with it still debate corner-locking versus edge-building approaches. If you enjoy this kind of number-based spatial thinking, puzzle and strategy games in the catalog have plenty more to keep you occupied — Launch Nonogram scratches a similar logic-forward itch if you want something more visual.

Cloud saves mean your grid survives if you close the tab, and the undo button makes this friendlier for casual sessions — though leaderboard chasers will want to skip undo entirely, since it affects your score ranking.