The AI Game Dev MandateCSYE 7270: Virtual Environments and Real-Time 3D

CSYE 7270 Midterm — LLM-Driven NPC Dialogue vs Rule-Based Behavior Trees

This video demonstrates why a system prompt is not a security boundary for game NPCs — and what to do instead.

Topic: Behavior Trees vs LLM-driven NPC dialogue — a security-focused design trade-off analysis

What's covered:
- Why rule-based behavior trees are structurally safe against adversarial player input
- How LLM NPCs fail under three attack categories: direct jailbreak, lore contradiction injection, and system prompt extraction
- The token-level mechanism that makes system prompts vulnerable
- The Human Decision Node: why I rejected the AI's proposed system prompt
- Live demo: one-line modification that breaks the entire NPC safety profile
- The hybrid architecture fix: deterministic wrapper around probabilistic generation

Видео The AI Game Dev MandateCSYE 7270: Virtual Environments and Real-Time 3D канала Yeshwanth Balaji