0.2.4

Early alpha, Windows PC (DirectX 12)

Date - Nov 1, 2026

New Features

A new physics core for the whole flight: gravity from the Earth, Moon, Sun and planets, and the Earth's true shape and spin
The day's wind from real Brownsville weather-balloon soundings, with gusts
Propellant boil-off, tank pressure, sloshing and heating; the balance point shifts as the tanks drain
Each Raptor started, shut down and throttled on its own (40% floor), with gimbal, RCS, flaps, grid fins and staging all through the real physics
New keys: G stage separation, Alt+I/K, J/L and U/O RCS translation, N header tank feed, V tank vent, B propellant dump (held)
The autopilot flies from the countdown to orbit as Flights 13 and 14 did: propellant loading, max-Q throttle-down, MECO, hot staging, the booster's flip and boostback
The default orbital flight burns straight into a 275 km orbit, then deorbits to a North Pacific splashdown
The default flight carries 26 Starlink V3 satellites, released in pairs
Countdown and ascent voice calls from "go for launch" to MECO
A new night sky: real stars in true colour and the Milky Way

Vehicle masses and propellant loads match Flight 14's speed and fuel gauges
Both Ship header tanks sit in the nose
The pad clamps let go by themselves once the engines' thrust beats the stack's weight
SAS flies with the RCS jets too, and holds the vehicle against the airflow with the engines off
Touch the stick under autopilot and you take only the axes you steer; let go and the autopilot takes them back
Readouts show what the vehicle's instruments measure; delta-v comes from the rocket equation
The stream banner and mission control calls follow the flight: LIFTOFF, MAX-Q, MECO, HOT STAGING, SECO, ORBIT INSERTION, BOOSTBACK
Updated Ship model and Pad 2 tower with matching chopsticks
The payload door slides inside the bay like the real one
RCS shows as straight gas jets; the propellant dump has its own effect

Grid fins no longer lose grip around Mach 1
The tower arms close on the vehicle instead of 3 m beside it
An engine whose start fails shows as out everywhere
Switching the autopilot off no longer cuts the engines
The Roadster's jets and the tyre dust show as a white cloud instead of an orange ball
Saves without a payload no longer bring an earlier flight's satellites into a start point

The menu still shows 0.2.3 in this build
The Ship's re-entry is being reworked: below about 30 km it falls faster than the real Ship
Autopilot landings and tower catches are being rebuilt for the new physics and aren't finished in this build

Download the current build from the player area. Found a bug? Report it on Discord with your build number.