Build a rocket, choose a planet, and launch.
Build voxel rockets in Minecraft Java Edition 26.3 with original Kerbal Space Program-inspired parts. Stack the Mk1 Capsule, FL-T100 fuel tanks, and RT-5 Flea booster, then use Mission Control to choose a destination and ride a short powered ascent to Kerbin, the Mun, Duna, Eve, or Moho. The Overworld remains available too.
Explore dry, bare-stone Mun and Moho, Moho’s frequent lava pits, red-and-orange mesa Duna, and purple-concrete Eve with its purple liquid. The mod uses original voxel art and does not include Minecraft or KSP game assets. Kerbal Space Program is inspiration only; it is not required.
Requires Minecraft Java Edition 26.3. The included portable Prism Launcher instance prepares Fabric Loader and includes Fabric API and Kerbalcraft. You must own Minecraft Java Edition and authorize your account at first launch. First startup can take longer while Minecraft and Fabric are prepared.
For multiplayer, install Kerbalcraft and Fabric API on the Minecraft server and every client, then join using Minecraft’s regular server browser. The game has no declared player cap; Melty does not automatically connect players to a server.
Rocket travel is a short powered ascent and destination arrival, not orbital physics. The parachute block is decorative in this release.
