Overheat

Slide and merge to grow your tiles — but every merge stokes the heat, and a twice-burned tile is a ticking bomb.

How to play

Overheat is a sliding number-merge puzzle with a heat economy bolted on. Slide the whole board so equal tiles combine into a bigger number, exactly like the classic powers-of-two puzzle. But each merge raises a tile's heat, and once a tile has merged twice it ignites with a short fuse. Merge an ignited tile again to vent the heat; let the fuse run out and the cell burns to permanent slag, shrinking your usable board.

• Slide left, right, up, or down to push every tile; equal numbers merge into their sum.
• Each merge adds heat; a tile heated twice ignites and shows a counting-down fuse.
• Merging an ignited tile vents it safely before the fuse expires.
• If a fuse hits zero the cell turns to slag and is blocked for the rest of the run.

Controls

• Desktop: arrow keys or WASD to slide the board in any direction.
• Phone & tablet: swipe in any direction on the board to slide the tiles.

Game modes

• Daily: a shared seeded board everyone plays the same day.
• Practice: an endless supply of fresh random boards.

Tips & strategy

• Vent ignited tiles fast — one slag cell is survivable, but a clump of them strangles the board.
• Keep your biggest tile pinned in a corner so casual merges don't accidentally over-heat it.
• Plan two slides ahead: line up an ignited tile next to its twin so the next move can vent it.

About Overheat

Overheat reimagines the sliding number-merge puzzle by turning runaway merges into a heat-management gamble, where greed literally burns holes in your board. It is an original, free browser game built in-house for PlayPendium.

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