Misery, not to be confused with the Stalker mod, is currently unavailable for purchase on Steam.

Misery, a Stalker-like post-apocalyptic shooter, has had its Steam page suspended following an alleged DMCA takedown request ...

As stated in the mod's description, the agents "aren't following predefined scripts" either. Instead, they're "operating off natural language instructions", which allows you to basically talk to them ...