🏗️ Stack
How to play
- Tap or click to drop the moving block the instant you see it lined up.
- Only the area that overlaps the block beneath survives the drop — everything else falls off the side and is lost.
- If your drop is perfect — a “Perfect Stack” — the tower keeps its full width and you get a visual bonus.
- Each floor switches movement direction: sometimes side-to-side, sometimes front-to-back. You have to track motion in both axes.
- The game ends as soon as a block misses the tower entirely — i.e. there is no overlap to keep.
Stack is a timing browser game on DropPlay where players stack moving blocks as precisely as possible to build a tower into the sky. On every drop, only the part of the block that overlaps the previous one survives — the rest falls off the side and is gone. What looks trivial at first becomes a patience test floor by floor: the usable surface shrinks with every imperfect drop, but the moving block keeps its constant speed. The mechanic is hypnotic because it never rushes you — you wait, you tap, you wait again. Stack runs directly in the browser on desktop and mobile, with no download and no signup.
Tips & strategy
- Watch the shadow, not the block itself. The projection onto the block beneath gives you a clearer alignment cue than the moving block in the air.
- Aim for perfect drops in the first ten floors. If you lose width early, you have no chance of tall towers later.
- If you do lose width, accept it fast and aim subsequent drops at the new centre line — chasing the old centre is the most common mistake.
- Take a breath before you tap. Stack rewards calm; rushing almost always produces tilted floors.
- On very narrow towers: tap a touch early rather than late. A small overlap on the leading edge always beats a near-miss.
- Take short breaks regularly. Stack is mentally more demanding than it looks because your eyes have to track motion continuously.
History & background
Stack-style stacking mechanics have roots in the 80s — predecessors like the Japanese arcade title “Tower of Druaga” and various Game Boy skill games used similar timing concepts. The modern form, where a block oscillates and gets sliced when you tap, was popularised in 2016 by the mobile game “Stack” from Ketchapp Studios — a French outfit that specialises in minimalist hyper-casual games and has won multiple awards for its reduced aesthetic. Stack reached over 100 million downloads worldwide and became the template for an entire genre of hyper-casual mobile games. On DropPlay, a custom in-browser implementation revisits the mechanic, optimised for both mouse and touch input.
FAQ
What is Stack on DropPlay?
Stack is a timing puzzle where you stack moving blocks as precisely as possible. Every imperfect drop shrinks the usable surface — until eventually a drop misses entirely.
How do I get a perfect stack?
Tap the instant the moving block sits exactly over the previous one. The engine is forgiving enough that you do not need pixel precision — but deviations beyond around 5 percent already cost width.
Is my high score saved?
Yes, the tallest tower is stored locally in your browser via the LocalStorage API. The data never leaves your device and persists between sessions.
Is Stack free?
Yes, like every game on DropPlay Stack is completely free and requires no signup. No in-game purchases, no ads before you start.
How tall can a Stack tower get?
Technically unlimited, practically capped by block speed and your reaction time. Towers above 50 floors are very good, over 100 is pro level.
Why does my tower suddenly lose width?
Every imperfect drop slices off a sliver of the block. It looks harmless at first but compounds: ten drops with 10 percent loss each leave you with only a third of the original width.
Score · Best ·