Kerbal Space Program began with a teenager strapping tin figurines to backyard fireworks and grew into one of the most respected spaceflight simulators ever made. This episode traces how a games director named Felipe, working at a Mexican marketing agency called Squad, pitched a physics-heavy rocket game to his bosses in 2010, shipped a bare-bones alpha in June 2011 with no stability assist and a non-rotating planet, and then let Steam Early Access and a devoted community shape it into a Newtonian sandbox where players learn Hohmann transfers, retrograde burns, aerobraking, and delta-v budgeting by blowing up rockets.

We dig into the clever compromises behind the game, including the patched conic approximation that replaced chaotic n-body physics and the ultra-dense home planet Kerbin that keeps Earth-like gravity on a 600-kilometer sphere. ...