Aphelion vs Kessler Cascade

Master gravity with one flick. Launch a comet, bend its trajectory around moving worlds, and complete 100 handcrafted orbital puzzles. EXPLORE TEN CHAPTERS • Aim with precision using a live trajectory preview • Slingshot around planets and capture stable orbits • Collect and deliver ice across moving systems • Reshape trajectories with timed engine burns • Survive atmospheric entry and dangerous ring crossings • Defend planets from incoming asteroids • Use animated solver hints whenever you’re stuck Play at your own pace with no timers, energy systems, or forced ads. The core game works offline and fits into a remarkably small download. One flick. One trajectory. One perfect solution.

Every satellite you launch adds mass to the sky. Fit enough of them into orbit and you win. Pack them badly and one collision sets off a Kessler syndrome cascade that wipes out everything above it. Kessler Cascade is a puzzle about timing, orbital mechanics and risk. Tap an orbit, pick your launch moment, and thread your satellite into a ring that's already full of traffic. Every orbit moves at its own speed. A bigger orbit is slower. An inclined orbit crosses the others. Get the timing wrong and you'll see why this is called a syndrome. HOW IT WORKS • Eight orbit types per level, from low orbits to far orbits, inclined planes and elongated Molniya ellipses • Launch into a gap between satellites that are already there • A collision creates a debris cloud that blocks that orbit and the ones above it • Your score is the total mass you put into orbit, with bonus multipliers for filling out communications, imaging and navigation constellations • Levels get harder as the planet's mass drops, which makes orbits faster and the gaps smaller LEVEL PACKS • MAIN: 30 levels, the first 5 free • MOON: a moon that travels around the planet, with low orbits around the moon itself, transfer orbits and a far-away L2 point • BINARY: two planets of different sizes, with orbits around each one and around both • RETROGRADE: orbits that run against the traffic, so you're flying head-on • DECAY: low orbits that fall and burn up, taking their mass with them, so speed and precision pay FAIR AND SIMPLE • The first 5 levels are free • Each unlock is a one-time purchase, with no ads, no subscriptions and no energy timers • No account, no tracking, no data collected • Works on iPhone and iPad How many satellites can you fit in orbit before it all comes down?