Pickaxe

No working codes are confirmed, and no expired codes are on record. No in-game redemption screen has been documented either.

On PC footage, press 2 to dig, close the hatch, press P and wall the entrance, press 3 and place one turret on the approach, keep some coins, then press 1 to start the raid. Building locks while a wave is active.

You dig the room yourself under the bunker and seal it with doors and tough blocks. Turrets can keep firing upstairs, but some Verities dig. Underground is a retreat, not immunity.

One Guns menu states you carry any 2 guns, assigned to slot 1 and slot 2. Coin-shop guns and Robux guns both have to be equipped there after you own them.

One run stated that reaching wave 10 unlocks rebirth and that rebirth gives more coins. Full requirements, costs, and bonuses are not documented. Progress is counted in waves survived, not levels.