Backdoors & Breaches – Tabletop Simulator Guide

**Executive Summary:** This guide provides step-by-step instructions to install Steam and Tabletop Simulator, subscribe to the Backdoors & Breaches (B&B / BHIS) mod on the Steam Workshop, and covers basic gameplay setup for running virtual tabletop incident-response exercises; it is an operational how-to and does not describe any cybersecurity incident, vulnerability, malware, or threat intelligence.