Digital Warfare

Netrunning and Cyberspace in Cyberpunk Red

Welcome to the Shattered Net

Imagine the internet as a vast city, and then imagine that city after a nuclear war. That's the Net in 2045 - a fractured landscape of isolated digital fortresses, prowled by killer programs and haunted by the ghosts of AIs that died in the DataKrash.

Netrunning isn't browsing the web - it's digital warfare. You're not clicking links; you're infiltrating enemy territory where the security systems can literally kill you. Your mind becomes a weapon, your cyberdeck becomes armor, and every line of code could be your last.

⚠️ CRITICAL WARNING: Flatline Risk

In Cyberpunk Red, netrunning can kill you. Not your character - YOU. When ICE deals damage, it's not hitting your health points - it's frying your actual brain. Death in cyberspace means death in meatspace. No respawns, no continues, no extra lives.

The Broken Architecture of Cyberspace

The Net in 2045 isn't the seamless global network we once knew. It's like a city where most of the bridges have been destroyed, leaving isolated neighborhoods connected only by dangerous, makeshift pathways.

The New Network Topology

The shape of a NET Architecture A NET Architecture is a vertical stack of floors. The netrunner enters at the top and descends one floor at a time. Each floor holds either something useful such as a password, a file or a control node, or something hostile such as Black ICE. The prize sits at the bottom. The DataKrash left no global Net. What remains are isolated towers you descend one floor at a time. FLOOR 1 · PasswordBackdoor to get past it FLOOR 2 · Black ICEIt fights back, and it can kill you FLOOR 3 · FileEye-Dee it, then copy or Zap FLOOR 4 · Control NodeDoors, cameras, turrets FLOOR 5 · The thing you came for ONE NET ACTION PER FLOOR you jack in here You cannot skip floors, and you cannot see what is on the next one until you are standing on it. Every floor costs a NET Action and you only get so many per turn — which is exactly why the rest of the crew is holding a corridor in meat-space while you do this.
Local Data Fortress
Corporate subnet
Heavily defended
Subnet Junction
Connection hub
Moderate security
Personal Node
Individual system
Light defenses
Dead Zone
Crashed systems
Rogue AI fragments
graph TB A[Netrunner's Cyberdeck] --> B[Local Subnet] B --> C{Security Check} C -->|Pass| D[Access Node] C -->|Fail| E[ICE Activation] D --> F[Navigate Architecture] F --> G[Target Data] E --> H[Combat in Cyberspace] H --> I{Survive?} I -->|Yes| F I -->|No| J[Flatline - Brain Death] style A stroke:#00ff00,stroke-width:3px style E stroke:#ff0000,stroke-width:3px style J stroke:#000000,stroke-width:3px style G stroke:#ffff00,stroke-width:3px

Real-world analogy: Think of the current Net like a medieval kingdom after a plague. Each castle (data fortress) is now isolated, with guards (ICE) watching every entrance. To get from one castle to another, you need to traverse dangerous wilderness where bandits (rogue AIs) hunt travelers.

Your Tools: Cyberdecks and Hardware

A cyberdeck is like a fighter jet for your mind - it amplifies your capabilities, protects you from digital attacks, and gives you the weapons you need to survive in cyberspace.

🖥️ Zetatech Parraline 5150

ATT: 5
Attack Power
DEF: 3
Defensive ICE
REZ: 4
Program Slots
Slots: 6
Total Programs

Mid-range deck popular with freelance netrunners. Like driving a reliable motorcycle - not the fastest or flashiest, but it'll get you where you need to go without breaking down.

💀 Raven Microcyb Blackbird

ATT: 7
Attack Power
DEF: 5
Defensive ICE
REZ: 6
Program Slots
Slots: 10
Total Programs

Military-grade hardware for serious netrunners. This is the digital equivalent of a stealth fighter - expensive, powerful, and absolutely deadly in the right hands.

Cyberdeck Components

Programs: Your Digital Weapons and Tools

Programs in cyberspace are like spells in a fantasy game, except instead of casting fireballs, you're casting code that can crash systems, steal data, or fry enemy brains.

🗝️ Backdoor

Class: Booster | Cost: 2 slots

Creates hidden entrances into systems. Like having a lockpick that works on digital doors - subtle, effective, and leaves minimal traces.

Effect: +2 to Interface checks when infiltrating systems

👻 Cloak

Class: Booster | Cost: 2 slots

Digital invisibility cloak. Hides your presence from detection systems and makes you harder to trace.

Effect: +2 to Stealth checks in cyberspace, harder to detect

🔍 Scanner

Class: Booster | Cost: 1 slot

Digital radar that maps out network architecture and identifies threats before you stumble into them.

Effect: Reveals ICE locations and types, maps network topology

🏃 Speedhack

Class: Booster | Cost: 3 slots

Overclocks your neural interface for faster processing. Like digital amphetamines for your brain.

Effect: Extra actions in cyberspace, but causes mental strain

⚔️ Sword

Class: Attacker | Cost: 2 slots

Basic anti-ICE weapon. Think of it as a digital combat knife - reliable, effective, and always useful.

Effect: 1d6 damage to ICE programs

💥 Sledgehammer

Class: Attacker | Cost: 4 slots

Brute force attack program that smashes through ICE like a digital battering ram. Subtle as a brick through a window, but twice as effective.

Effect: 2d6 damage to ICE, but creates lots of noise

🛡️ Shield

Class: Defender | Cost: 2 slots

Digital armor that absorbs ICE attacks. Like wearing kevlar for your consciousness.

Effect: Reduces ICE damage by 2 points

🩹 Armor

Class: Defender | Cost: 3 slots

Heavy-duty protection against serious ICE. Military-grade digital armor for when things get really dangerous.

Effect: Reduces ICE damage by 4 points

ICE: The Digital Guardians

Intrusion Countermeasures Electronics (ICE) are the guard dogs of cyberspace. Some bark, some bite, and some will tear your brain apart without breaking a digital sweat.

Cyberpunk Red’s Black ICE splits into three jobs, and confusing them is how netrunners die. Some ICE hurts you. Some ICE hurts your programs. Some ICE just makes you worse at everything for the next hour. Knowing which one you are looking at decides whether you fight or run.

Black ICE that attacks you

Damage from these goes straight to the Netrunner’s brain. This is the category that ends characters.

Wisp

The weakest of them, and still not harmless.

Effect: 1d6 damage direct to your brain, and you lose one NET Action next turn (down to a floor of 2).

Hellhound

Effect: 2d6 to your brain — and it sets fire to an uninsulated cyberdeck and the clothes you are wearing. Insulation is not a luxury purchase.

Giant

Effect: 3d6 to your brain and you are forced to Jack Out unsafely, which is its own injury.

Kraken

Effect: 3d6 to your brain, and while it lives you cannot move deeper into the Architecture or jack out safely. It does not just hurt you, it traps you.

Raven

Effect: 1d6 to your brain and it destroys one of your Defender Programs at random — softening you up for whatever is on the next floor.

Black ICE that attacks your programs

These never touch you. They strip your loadout instead, which is worse than it sounds: a netrunner with no Attacker left has nothing to do but retreat.

Asp

Effect: Destroys a random Program on your cyberdeck outright. No damage roll, no save.

Killer

Effect: 4d6 damage to a Program. Despite the name, it is not trying to kill you.

Sabertooth

Effect: 6d6 damage to a Program.

Dragon

Effect: 6d6 damage to a Program — and if that Derezzes it, the program is Destroyed instead, meaning it is gone for good rather than just switched off.

Black ICE that degrades you

No damage at all. These follow you out of the Net, and the debuff outlasts the run.

Liche

Effect: Psychosomatically reduces your INT, REF and DEX by 1d6 each (minimum 1) for a full hour. You survive the Net and then discover you are useless in the firefight on the way out.

Scorpion

Effect: Reduces your MOVE by 1d6 (minimum 1) for an hour. Same trick, applied to your ability to run away.

Skunk

Effect: All your Slide Checks take a −2 penalty until it is Derezzed. It does not stop you escaping — it just makes escaping unreliable.

Why the names mislead on purpose

Read those three groups again and notice how badly intuition serves you. Killer attacks programs. Wisp, which sounds like nothing, does real brain damage. Liche does no damage at all and is still one of the worst things on the board, because it follows you into meatspace.

A netrunner who assumes the scary-sounding ICE is the dangerous one will spend their Attacker programs on a Sabertooth that was never going to hurt them, and then meet a Wisp with nothing left.

ICE Behavior Patterns

stateDiagram-v2 [*] --> Passive: ICE dormant Passive --> Alert: Netrunner detected Alert --> Active: Threat confirmed Active --> Hunting: Target acquired Hunting --> Combat: Netrunner engaged Combat --> Destroyed: ICE defeated Combat --> Victory: Netrunner eliminated Alert --> Passive: False alarm note right of Passive: Scanning for intrusions note right of Alert: Investigating suspicious activity note right of Active: Confirming threat status note right of Hunting: Pursuing target note right of Combat: Full attack mode

Net Actions: What You Can Do in Cyberspace

Every action in cyberspace is a calculated risk. Move too fast and you trigger alarms. Move too slow and you're sitting duck for ICE patrols.

How many actions you get

Your Interface Rank is your budget: it sets how many NET Actions you take per turn. Every roll below is 1d10 + Interface against a DV — Interface is doing double duty as both your action economy and your entire skill at this, which is why it is the one number a netrunner raises first.

Note what is not in that formula: INT. Unlike every other check in Cyberpunk Red, NET Actions do not add a STAT and a Skill. The Interface Rank replaces both.

Netrunning Action Simulator

Try different netrunning actions and see their effects!

🔍 Scanner

Roll: 1d10 + Interface vs. the floor’s DV

Map the network architecture and identify threats. Knowledge is power, and power keeps you alive.

Success: Reveals ICE locations, network topology, and data files

Failure: Incomplete information, possible detection

🚪 Backdoor

Roll: 1d10 + Interface vs. Security Level

Find hidden ways into protected systems. Sometimes the service entrance is safer than the front door.

Success: Bypass security, avoid ICE detection

Failure: Triggers alarms, attracts ICE attention

👻 Cloak

Roll: 1d10 + Interface vs. ICE Perception

Hide your digital presence from security systems. Invisibility is the ultimate defense.

Success: Remain undetected while moving through network

Failure: ICE spots you, initiates pursuit protocols

🎮 Control

Roll: 1d10 + Interface vs. System Security

Take command of enemy systems and turn them against their owners.

Success: Gain control of cameras, doors, weapons, or other systems

Failure: System lockdown, increased security response

💾 Eye-Dee

Roll: 1d10 + Interface vs. File Security

Identify and analyze data files. Not all data is created equal - some files are traps.

Success: Determine file contents, security level, and value

Failure: Misidentify file type, possible data bomb activation

📂 Grab

Roll: 1d10 + Interface vs. File Security

Steal data files and download them to your cyberdeck. The whole point of most runs.

Success: Successfully copy file to your deck

Failure: File corrupted, incomplete download, or triggers trace

🏃 Jack Out

Automatic Success (unless prevented by ICE)

Emergency exit from cyberspace. Sometimes retreat is the better part of valor.

Note: Some ICE can prevent jack-out, trapping you in cyberspace

Combat in Cyberspace

Digital combat isn't about physical strength or reflexes - it's about processing power, programming skill, and the will to survive when your opponent is trying to delete your consciousness.

🟢 Netrunner | 🔴 ICE | 🟡 Data | ⬜ Empty Space

Digital Combat Phases

flowchart LR A[Initiative Phase] --> B[Movement Phase] B --> C[Action Phase] C --> D[Resolution Phase] D --> E{Combat Over?} E -->|No| A E -->|Yes| F[Jack Out or Continue] style A stroke:#4ecdc4,stroke-width:3px style C stroke:#ff6b6b,stroke-width:3px style F stroke:#96ceb4,stroke-width:3px

Attack Resolution in Cyberspace

  1. Declare Target: Choose which ICE to attack
  2. Roll Attack: 1d10 + 1d10 + Interface vs. ICE Defense
  3. Roll the program’s damage — the dice come from the Attacker Program you used, not from your Interface. Interface decides whether you hit, not how hard.
  4. Apply Damage: Reduce ICE's REZ value
  5. Check Destruction: ICE at 0 REZ is destroyed

💀 When ICE Fights Back

ICE attacks work the same way, but they target your mental health directly:

  • ICE rolls: 1d10 + its ATK against your DEF
  • Damage: Goes straight to your physical health
  • Critical damage: Can cause brain damage or death
  • No armor: Your meat body can't protect your digital mind

Data Fortresses: Digital Dungeons

Data fortresses are like digital castles - layered defenses protecting valuable information. Each one is unique, reflecting the paranoia and resources of whoever built it.

🏰 Arasaka Secure Node Architecture

graph TD A[Public Access] --> B[Outer Perimeter] B --> C[Firewall Layer 1] C --> D[ICE Patrol Zone] D --> E[Firewall Layer 2] E --> F[Administrative Level] F --> G[Executive Data Vault] G --> H[Black ICE Zone] H --> I[Ultra-Secure Core] J[Service Entrance] --> D K[Maintenance Tunnel] --> F style A stroke:#4CAF50,stroke-width:3px style I stroke:#FF0000,stroke-width:3px style H stroke:#000000,stroke-width:3px style J stroke:#FF9800,stroke-width:3px style K stroke:#9C27B0,stroke-width:3px

Security Rating: Military Grade

ICE Complement: 3 Wisps, 2 Asps, 1 Killer, 1 Liche

Special Defenses: Trace programs, data bombs, black ICE

Valuable Data: Corporate secrets, employee records, financial data

Common Fortress Features

Fortress Penetration Strategies

🎯 The Stealth Approach

Use Cloak and Backdoor programs to slip past security undetected. Slower but safer.

⚔️ The Assault Approach

Use powerful attack programs to smash through ICE. Faster but louder.

🔧 The Technical Approach

Find service entrances and maintenance tunnels. Requires system knowledge.

🎭 The Social Approach

Steal legitimate access codes through social engineering. Most elegant when it works.

Advanced Netrunning Concepts

Trace Programs and Counter-Surveillance

When you're in a system, that system can try to track you back to your physical location. It's like having someone follow you home after you burglarize their house.

Data Bombs and Digital Traps

Not all data is safe to steal. Some files are booby-trapped with programs designed to fry curious netrunners.

Rogue AIs and Digital Ghosts

The DataKrash didn't just destroy the Net - it shattered several powerful AIs into fragments that still haunt cyberspace like digital ghosts.

Corporate Netwar

Sometimes netrunners find themselves caught in digital battles between megacorporations - cyber-warfare on a scale that makes individual runs look like schoolyard fights.

Building and Running Netrunning Scenarios

For GMs, netrunning scenes should feel like a combination of heist movie, war film, and horror story. The stakes are life and death, the tension should be constant, and every success should feel earned.

Scenario Structure

  1. Preparation: Intelligence gathering, equipment selection
  2. Infiltration: Getting into the target system
  3. Navigation: Moving through the digital environment
  4. Obstacles: ICE encounters, security measures
  5. Objective: Stealing data, planting viruses, sabotage
  6. Extraction: Getting out alive with the goods

Pacing and Tension

Integrating with Meatspace

The best netrunning scenes connect with the physical world:

Netrunning Ethics and Philosophy

In a world where information is power and corporations control everything, netrunners occupy a unique moral space. They're digital Robin Hoods, cyber-terrorists, freedom fighters, and criminals all at once.

The Netrunner's Code

Moral Dilemmas

The Future of Netrunning

The Net in 2045 is broken, but it's slowly being rebuilt. New protocols are emerging, new threats are developing, and the balance between security and freedom continues to shift.

As a netrunner, you're not just a digital thief or warrior - you're an architect of the future. Every system you hack, every piece of data you liberate, every ICE you destroy is a vote for what kind of digital world will emerge from the ashes of the DataKrash.

The question isn't whether you can survive in cyberspace - it's whether the cyberspace that emerges will be one worth surviving in.

🌐 Remember: The Stakes Are Real

Netrunning in Cyberpunk Red isn't a game within a game - it's digital warfare with lethal consequences. Every time you jack in, you're risking not just your character's life, but their sanity, their humanity, and their soul.

Make it count.