Koala Solar Explorer
Try the alpha

KOALA SOLAR EXPLORER · WINDOWS & macOS ALPHA

Build. Fly.
Discover.

A little explorer. A whole solar system.
Build the ship. Make the journey your own.

Explore the gameTry the alpha
MEET KOALANAUT IN GAME

From the first stage
to the lunar surface.

Explore the game

01 VEHICLE ASSEMBLY

Build something
worth flying.

Choose engines, tanks, crew cabins and equipment. Connect the parts, arrange your stages and check the craft before launch.

ASSEMBLE · EQUIP · STAGE · CHECK

02 FLIGHT OPERATIONS

Your build.
Your first flight.

Roll the spacecraft you just built onto the pad. Light the engines, work through the stages and follow the flight on the current instruments.

THE SAME SPACECRAFT · IN FLIGHT

03 MISSION PLANNING

Take the
long way round.

Shape an interplanetary transfer, inspect your arrival and bend the route around a gravity assist. See where the next burn takes you.

TRANSFER ORBITS · GRAVITY ASSISTS

04 HISTORIC MISSIONS

Fly the legends.

Take Saturn V on the Apollo 11 mission sequence, or climb into Atlantis. Fly iconic spacecraft with guidance or take the controls yourself.

SATURN V · ATLANTIS · IN-GAME FLIGHT

05 APOLLO 11 · LUNAR OPERATIONS

The Eagle
has landed.

Bring Eagle down onto the lunar surface. Leave the descent stage behind and lift off again to meet Columbia in orbit. See the mission from a different angle.

POWERED DESCENT · TOUCHDOWN · LUNAR ASCENT

KOALA SOLAR EXPLORER

Choose your launchpad.

The same solar system. Your computer.
Choose the download for your operating system.

WINDOWS ALPHA 0.1.15

Windows

Windows 10 or 11 · Intel or AMD 64-bit (x64)

Checking Windows download…

EXE installer

Windows alpha with in-game updates. Smaller downloads reuse unchanged parts of the previous installer when available. Native Windows gameplay and update testing is pending.

Windows release details

Installation

Run the downloaded installer. It installs for your Windows account and creates a Start menu shortcut.

This alpha is unsigned. Windows may show an unknown-publisher or SmartScreen warning. Only continue if you trust this download.

Requires hardware-accelerated WebGL 2. Performance varies by graphics card.

macOS ALPHA 0.1.13

Mac

Apple silicon · macOS 13 or later

Download for Mac

DMG installer · 2.27 GB

Smoother Starship launches and flight, with lighter cinematic launch water, reduced stutters, and improved automatic resolution that keeps instruments sharp during demanding scenes. Removed the 60 FPS cap. In matched Auto-resolution tests, average FPS increased 103% at launch, 64% during ascent and 34% in orbit versus the October 1 pre-optimization build. Measured on one Apple M5 Max; results vary, and the orbit gain includes removal of the old cap. Launch and ascent still need further optimization to sustain 60 FPS.

Mac release details

Installation

Already playing? Check for Updates in the game for smaller patch downloads, even if you skip releases. If you are on 0.1.0, install this version once.

Open the DMG and drag Koala Solar Explorer to Applications.

This alpha is not Developer ID signed or notarized. If macOS blocks the app after you try to open it, go to System Settings → Privacy & Security → Open Anyway.

An alpha in active development. Keep a backup of your saved games before installing a new version.