Zero Orbit slot
A space station, a pilot and a stranger in a violet cloak. Six columns, five rows, and a planet beside every row that grows each time a group touches it.
Groups, cascades and planets
Five or more matching symbols touching side by side or above and below form a group. It pays, disappears, and new symbols fall in. Each row has its own planet, starting at ×1: a group is multiplied by the highest planet it touches, then that planet climbs a step, up to ×10. In the base game the planets reset every round.
The comet is the wild. It joins any group, and when it lands, the planet of its row levels up straight away.
Free spins through the portals
Four, five or six portals give 10, 12 or 15 free spins, and this time the planets keep their level for the whole bonus. A row that reaches ×10 early stays dangerous to the end. The bonus can be bought for about 35× the bet.
Next to our other cluster game, Vénus Nova, Zero Orbit hits less often (about one spin in three pays) but its bonus is far cheaper to buy, and its biggest wins come from planets you build up yourself rather than from a single lucky cascade.