Corehold

Hold off thousands

We lost the surface and went underground. Every run, the Core rises through the hatch and the horde comes for it: hundreds, then thousands, then more than ten thousand creatures at once, every one of them simulated and pushing. The Core pushes back.

Craft your Weapon

Build the Weapon at the centre of the Core from parts: a receiver, barrels, ammo, a scope, a power cell, a muzzle, a magazine and a motor. Up to four barrels, each with its own arc and its own target. 93 Weapon parts across 7 rarities, from Common to Exotic, each with its own perks. Every combination draws its own Weapon.

Upgrade your Core

Fit out the Core the same way, with a Hearth and 7 more slots for power, shields and more. 77 Core parts, each Hearth with its own Doctrine.

Build a fortress, then merge to grow stronger

Every level-up offers picks for the run grid: 26 weapons, 22 supports, 11 economy buildings, troop huts and 12 abilities. Merge identical buildings to rank them up, and set a ranked weapon beside its partner to evolve it. No two runs build the same fortress.

Develop your underground Outpost

Between runs, grow the colony's home in the cavern. Place and upgrade 30 kinds of buildings across 5 districts, run power lines from the Core, dig into the rock for finds, pair neighbours for bonuses and bring specialists home from the surface.

Research new tech

55 research projects in 7 categories make the Core, the Weapon, your loot and your Outpost stronger, and keep working while you're away.

Take back the surface

• 6 sectors, from the Wasteland to the Crater Core, each ending in its own final boss.
  
• An endless mode with stacking Mutations once you're strong enough.
  
• Ascension: start again stronger, up to 5 times.

Fair by design

• No paid currency, no ads, no in-game store. Everything is earned in play.
  
• Offline progress never beats playing.
  
• Visible odds and a pity meter on loot finds.