Signal Zero

Signal Zero is an idle strategy simulation set in a dystopia ruled by AI. As the resistance leader, you design viruses and inject them into the AI network to dismantle its control and liberate humanity, one area at a time. Humanity is enslaved and forced to mine resources, generate training data and maintain the AI’s infrastructure.

Design and spread viruses

You combine frameworks, protocols and modules to build a virus, then choose a starting country from 20, each with its own difficulty and parameters. The infection spreads automatically, while the AI develops patches to stop it; you must balance stealth, resistance and adaptation against its countermeasures. Four virus archetypes focus on Infectivity, Stealth, Destruction or Adaptation.

You earn cores to unlock skills, expand the skill tree and evolve your virus. The world is organized into countries and areas, which call for different tactics. You can also attack communication infrastructure to reduce the AI’s coordination, and use persistent hardware progression to permanently augment your skills.

Victory and defeat

Liberating all areas wins the campaign, while a full purge results in defeat. The three difficulty tiers—Easy, Normal and Hard—are chosen through your starting country. The game includes 16 achievements for goals such as cumulative infection, speed clears and completing runs without detection.

Key features

• Virus-building system combining frameworks, protocols and modules
• 20 starting countries with unique parameters and difficulty
• Four virus archetypes: Infectivity, Stealth, Destruction and Adaptation
• Three difficulty tiers: Easy, Normal and Hard
• 16 achievements
• Persistent hardware progression
• Steam Cloud save syncing