Hack The Box for Red Teams is a hands-on cybersecurity training and assessment platform tailored for offensive security practitioners, including penetration testers, red team operators, and malware/exploit developers. The platform offers three primary delivery modes: - Training Plans: Structured learning paths with 1,000+ courses and labs covering fundamentals through advanced adversary emulation, including AI-focused red teaming content and CVE-specific scenarios. - Cyber Ranges: Simulated enterprise-scale network environments for practicing pivoting, IDS evasion, exploitation, adversary simulation against fully patched enterprise technologies, and malware deployment observation. - Team Assessments: Pre-built or custom CTF-style events (jeopardy or Active Directory chains) with live leaderboards, time scoring, and post-event analytics. Events can be deployed in under 10 minutes from 180+ available scenarios. Content is mapped to MITRE ATT&CK and NIST NICE frameworks, enabling teams to measure coverage against recognized standards. The platform supports full kill-chain simulation from open-source reconnaissance through data exfiltration. Analytics capabilities include individual and team performance tracking, skill coverage heatmaps visualized against MITRE ATT&CK and NIST NICE, and exportable skill metrics for integration with external LMS systems. The platform targets multiple user personas: cybersecurity newcomers building foundational skills, seasoned red teamers replaying APT playbooks, and security managers needing role-based analytics and skill gap reporting to demonstrate team readiness.