Stack the parts, light the engine

Stack engines, tanks, fins and parachutes on the stand in a cheerful workshop, press Launch and follow your rocket up through the clouds and into the starry dark.

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Genre: Physics building
Controls: Touch
Mouse
Keyboard
Devices: Desktop
Tablet
Mobile
Released: 2026

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Rocket Workshop

Rocket Workshop is a rocket builder with real flight physics. Drag parts from the shelf onto the stand: three engines, three fuel tanks, fins, side boosters, a parachute, a crew pod, a satellite, lander legs and a nose cone. Every part has a weight and a price. Press Launch and the camera follows your rocket off the pad, past hot-air balloons and clouds, through a sky that turns from blue to starry black, with the height and speed on screen. Empty stages drop away with a soft puff, the parachute opens by itself on the way down, and a flight report shows how high and how fast you went.

The forty missions are a proper brain workout. Reach a height, deliver the satellite above a line, fly through three rings, land softly on a pad, then do it all again on the Moon, where there is no air for a parachute and you land on legs with the throttle. Each mission has a budget and a part limit, and three stars: one for the goal, one for staying under budget and one for a clean landing. Fins matter: if the air pushes higher up the rocket than its weight sits, it wobbles, cuts its engine and drifts home under its parachute. Nothing ever explodes.

Free build is the place to relax. There is no budget and no goal, just paint for the hull, a launch site on Earth or the Moon, twenty save slots and a Photo button that saves a picture of your rocket on the pad. Undo and redo go back fifty steps. Build with a mouse or a finger, or entirely from the keyboard, and short flights make for a quick round between other things.

Tips for Rocket Workshop

In Rocket Workshop a rocket that flies straight matters more than a rocket that is simply big. If yours starts to wobble, cuts its engine and floats back down under the parachute, the air is pushing on it higher up than its weight sits, and the fix is usually fins rather than another engine. Watch the height and speed on screen during each flight and read the flight report afterwards, so you know how far short you fell before changing anything.

In the missions, aim for the goal star first and worry about the other two afterwards. Once a rocket reaches the height or the rings, take parts away one at a time to get under the budget, then work on a clean landing. The Moon missions change the plan: there is no air for a parachute, so bring lander legs and save some throttle for the way down. If you just want to experiment, Free build has no budget or goal, and undo goes back fifty steps.

Frequently asked questions

Is Rocket Workshop free to play?

Yes. Rocket Workshop is free to play in your browser on Kiloo. There is nothing to download and no account to create. Free build gives you twenty save slots for your rockets, and the Photo button saves a picture of a rocket on the pad.

Can I play Rocket Workshop on my phone?

Yes. On a phone or tablet you drag or tap parts onto the stand and steer and throttle with the on-screen buttons. On a computer you can build with the mouse or entirely from the keyboard, with the arrows to steer and throttle in flight.

How do I get three stars in Rocket Workshop?

Each of the forty missions has three stars: one for reaching the goal, one for staying under the mission's budget and one for a clean landing. Every part has a weight and a price, so a lighter, cheaper rocket that still reaches the goal is the way to collect all three.

How do I land on the Moon in Rocket Workshop?

The Moon has no air, so a parachute does nothing there. You land on lander legs instead, easing the throttle with the up and down arrows or the on-screen buttons to slow the rocket before it touches the surface.