Station Zero

Only the core of the space station ARC ZERO remains. Hold back the bio-swarm and protect the planet.

Every run starts from an empty hex core. Attach the tiles you win in battle and build a station of your own - every run ends with a different station.

■ Branching sector maps

Three sectors - Luna Outskirts, the Asteroid Belt and the Swarm Nest - each with ten floors of branching routes and a boss at the end. Tap a node to preview its rewards and risk, then choose between battles, elites, supply ships, signals, salvage containers and repair stops. Each sector rolls one of five route traits, and hull damage carries over between battles, so choose your path carefully.

■ Build with hex tiles

Seven tile types - hangar, battery, missile, shield, repair, collector and amplifier - snap onto the six slots around your core, and clearing the first sector opens an outer ring of six more. Find placements where neighbors boost each other, like batteries next to an amplifier.

■ Spectacular auto-battles

Your station fights on its own while interceptor squadrons and orbital satellites join the defense. Fire the railgun yourself or leave it on auto. Fifteen relics can change your build completely.

■ Grow stronger between runs

After each run, spend core shards on eight shipyard upgrades, and unlock new tiles, relics and starting ships through achievements. After your first clear, take on threat levels 1-10.

■ Made for your phone

Portrait, touch controls. Plays without an internet connection.