Stack Chaos: Alien Express artwork$4.90

Stack Chaos: Alien Express

A physics-based arcade game where you pilot a UFO dropping possessed horror objects to build impossible towers. Swing the pendulum, time the drop, pray it doesn't collapse. 400+ objects, 11 game modes, and a sarcastic goblin that roasts your every move.

Screenshots

From the Steam store

5 seconds to decide your fate

Your UFO dangles a possessed object from its tractor beam like a pendulum: it swings with real inertia, it resists, it has a will of its own. You have exactly 5 seconds before the auto-drop. Cut the beam at the perfect instant or let the game decide for you... and the game is never kind. Every drop is a gamble: fast scores points, risky scores more, and one mistake turns into an avalanche of possessed objects crashing down on your tower.

The tower isn't nailed to the ground: move it

Object falling crooked? Did the pendulum leave you the piece at the worst possible angle? With A and D you shift the entire tower to adapt it to the falling trajectory and to everything happening on screen. Stacking here isn't just about dropping well: it's about catching well. A well-timed micro-adjustment saves the run; a panicked lurch buries it under its own weight.

The birds are coming for your tower... shoot first

Birds don't cross your flight path by accident: they're heading straight for your masterpiece. But your UFO isn't just a flying crane. Shoot them down mid-flight before impact and turn every wave into a shooting gallery where every bird you take down is a disaster you won't have to rebuild.

...or let them crash exactly where it suits you

Tower leaning dangerously to one side? A bird slamming into just the right spot is exactly the push you need. Allow controlled impacts in the zones where you need them and turn your enemies into unwitting bricklayers who straighten your tower. Knowing when to shoot and when to hold fire is a skill of its own... and the difference between chaos and a masterpiece.

And this is just the beginning of the chaos

A sarcastic goblin comments on your every move, celebrates your disasters and mocks your teetering towers: the voice that turns every failure into a laugh and the reason you try again just to shut him up. Over 400 possessed objects of cartoon horror, each with its own physics and its own character: learning to stack a trembling candelabrum won't prepare you for the bouncy coffin. 11 modes that completely reinvent the stacking challenge, 36 UFO skins, storms and meteors that hit right when you need to focus most. And Stream Rooms, where your viewers play against you in real time while you broadcast, with global leaderboards and daily challenges: every tower you build stops being just yours and becomes something the whole world can try to beat.

Get Stack Chaos: Alien Express now and find out how high you can stack before the chaos wins.

Features

Master the pendulum physics and decide in 5 seconds whether to play it safe or risk it all Move the tower with A and D to adapt it to every drop and everything happening on screen Shoot birds out of the sky... or let them hit exactly where you need to straighten your tower Discover over 400 possessed objects, each with its own physical personality Laugh (or suffer) with a goblin who comments on and mocks every tower you build Choose from 11 modes that completely reinvent the stacking challenge Compete live against your own viewers in Stream Rooms

Games like Stack Chaos: Alien Express

See all
Almost a Tower

Almost a Tower

A physics puzzle about stacking objects of different shapes and weights.

100% of 6 Steam reviews are positive$2
ChaosTower

ChaosTower

Chaostower - Build and defend, a physics-based action puzzler.

81% of 16 Steam reviews are positive$1.99
HAKO TOWER

HAKO TOWER

Welcome to HAKO TOWER, a physics-based tower builder! Stack blocks, scream as they fall, and dodge obstacles. And... adore Hako.

100% of 1 Steam reviews are positive$2.99
Clean Stack

Clean Stack

« Clean Stack » is a little puzzle game that involves stacking odd-sized objects with fun physics without making anything touch the ground.

91% of 35 Steam reviews are positiveFree
PHAT STACKS

PHAT STACKS

Phat Stacks is puzzle platformer, physics based addictive arcade game that is all about collecting crystals by building platforms and controlling an…

75% of 48 Steam reviews are positive$1.99
Tower Lab

Tower Lab

Enemies have no health, push them off instead. Weaponize physics in this physics-sandbox-inspired tower defense game with multiple game modes.

72% of 161 Steam reviews are positivePlayers online now: 1$9.99
Radical Relocation

Radical Relocation

Radical Relocation is an absurd physics-based puzzle game that turns a sleepy neighbourhood into an insane obstacle course!

74% of 259 Steam reviews are positive$9.99
Super Space Towers

Super Space Towers

Super Space Towers is a space 3D physics puzzle action game.

100% of 12 Steam reviews are positive$5.99
Skyblocker

Skyblocker

Stack your tower as high and as fast as you can in Skyblocker, an infinitely fun and replayable physics-based 3D puzzle game.

94% of 16 Steam reviews are positive$4.99
Pile Up

Pile Up

In Pile Up - a cozy, object stacking puzzle game with playful physics - every object matters.

100% of 4 Steam reviews are positiveFree
Mistress Of The Tower

Mistress Of The Tower

Welcome to Mistress Of The Tower! Discover a... highly dubious school for wizards, where you can learn to build huge towers. Well... in theory.

100% of 4 Steam reviews are positive$1.79