Analyze native Linux, SteamOS, Steam Deck and Proton game-security boundaries. Use for compatibility-versus-policy triage, ELF/process evidence, credentials and capabilities, namespaces, seccomp, LSMs and Linux memory forensics; select repository resources across Wine, kernel, WSL and forensic categories. Record the actual kernel, distribution, runtime and active policy; distinguish platform mismatch, observation gaps and suspicious behavior with explicit privilege prerequisites and benign comparisons.