Phantom I is live - a 22 level Linux post-exploitation wargame you SSH into (free, no setup)

BreachLab has launched Phantom I, a free hosted Linux post-exploitation wargame with 22 levels across 5 acts that users access via SSH without requiring VM downloads or setup. The game covers a realistic engagement arc including privilege escalation, credential access, persistence and evasion, lateral movement, and exfiltration, with techniques mapped to MITRE ATT&CK. Each session runs in ephemeral per-user containers with server-side grading based on actual system state rather than flag strings, and completion awards a certificate.