Sum Surge — play free online

â–¶ Play Sum Surge now

Inside the number reactor, tiles carry raw digits that ache to become whole sums. The target glows; the clock burns down. Feed the reactor perfect sums and it feeds you time.

How to play

1. A target number glows at the top.
2. Tap tiles that add up exactly to the target — or move with the arrow keys and press Enter.
3. A correct sum scores points and refills time; overshooting resets your picks.
4. Every correct sum buys you more time.

Sum Surge is one of 23 free original mini-games on GameKomio. It runs in any modern browser on phone, tablet or desktop — no sign-up, no download, no ads — and is playable in ten languages. Your high score is saved on your device.

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