Project Orion

Project Orion is a server-side Left 4 Dead 2 anti-cheat for competitive SourceMod servers. It is designed as the BLACKWATCH replacement path for Lilac/SMAC checks, with shadow-mode validation before enforcement.

Project Orion uses static cheat dissection, threat-intel mapping, server-side evidence scoring, and safe data-minimization controls. Enforcement is evidence-based and disabled by default until a staging corpus proves thresholds are reliable.

Detection surfaces

• Static, non-executing analysis of Reborn-style trainer samples.
• orion_visibility_guard for ghost/inactive infected data minimization and PVS-hidden enemy evidence.
• orion_usercmd_guard for SMAC-style usercmd reuse, regression, tick mutation, and impossible-angle evidence.
• orion_aim_analyzer for silent/perfect/humanized aim, snap history, autoshoot, and starter weapon-outcome evidence.
• orion_movement_analyzer for bhop, macro, speedhack, fakelag/choke, latency-aware tick drift, and movement anomalies.
• orion_cvar_policy plus orion_integrity for data-driven client cvar policy, interpolation, ping/loss, chat-clear, and invalid-name evidence.
• orion_abuse_guard for command-rate, dangerous command, and name-change abuse evidence.
• orion_evidence for structured admin-reviewable logs.

Validation

python -m unittest discover -s tests -p "test_*.py"
spcomp -E -w234 -w217 -O2 -v2 addons/sourcemod/scripting/orion.sp

See docs/index.md for the complete workflow.