The update adds a new difficulty tier, a horde mode and a raft of quality-of-life fixes based on player feedback.

Cold Harbor Games has outlined a free post-launch update for Null Signal, adding a higher difficulty tier, a wave-based horde mode and a long list of quality-of-life improvements drawn from player feedback.

The studio said the update reflects its intention to support the game with meaningful content rather than cosmetic storefronts.