Crash number tiles into minus-tiles to whittle them down and hit the target value on the nose.
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How to play
Slide the whole grid in one direction and tiles travel until they collide. When a number tile meets a minus-tile, its value drops by that amount. Reduce any tile to exactly the target number to win, but overshoot below zero and you lose.
Slide to move every tile at once
A number tile meeting a minus-tile subtracts in place
Land a tile exactly on the target to win
Dropping below zero, running out of moves, or filling the board ends the run
Controls
Desktop: arrow keys or WASD to slide the grid
Phone & tablet: swipe in any direction
Game modes
Daily: a shared seeded target and move budget
Practice: randomized puzzles to train on
Tips & strategy
Plan the order of subtractions, since overshooting past zero is an instant loss
Keep spare minus-tiles in reserve so you can fine-tune the final approach
Mind your roughly thirty-move budget and avoid wasted slides
About Subtraction Stack
Subtraction Stack is an original free browser sliding number-merge puzzle with a subtractive twist, rewarding arithmetic planning over luck. No download required.
A free, original browser game on PlayPendium. No download, no install.
