Stack Chaos: Alien Express

Stack Chaos: Alien Express is a physics-based stacking game in which you use a UFO’s tractor beam to drop possessed objects onto a tower. Each object swings with inertia and resists the beam; you have exactly 5 seconds before it drops automatically. Cut the beam at the right moment to control the landing: fast drops score points, while risky drops score more, but a mistake can send objects tumbling into an avalanche.

Stack and adjust

You can shift the entire tower with A and D to adapt to an object’s falling path and the activity on screen. Stacking depends on catching objects as well as dropping them: a small, well-timed adjustment can save a run, while a panicked movement can bring the tower down.

Birds and impacts

Birds fly toward your tower, and you can shoot them down before they hit. Each bird you stop is one less impact to recover from, but you can also let birds crash into chosen spots. A carefully placed hit can push a leaning tower back into shape, so deciding when to fire and when to hold your shot is part of the challenge.

Objects and modes

The game has over 400 possessed objects, each with its own physics and character. Learning to stack a trembling candelabrum does not prepare you for a bouncy coffin. You can also choose from 11 modes that change the stacking challenge, and customize your UFO with 36 skins. Storms and meteors add further hazards while you build.

Goblin and competition

A sarcastic goblin comments on your moves, celebrates your disasters and mocks your unstable towers. Stream Rooms let viewers play against you in real time while you broadcast. The game also includes global leaderboards and daily challenges.