AI in Video Games: What It Means—NPC Decisions, Pathfinding, ProcGen, Dynamic Difficulty

AI (Artificial Intelligence) in games refers to algorithms that drive non-player entity behavior, creating the illusion of intelligence.

Core Applications

• NPC Decision Making: Finite State Machines, Behavior Trees, Utility AI, GOAP (Goal-Oriented Action Planning) – e.g., F.E.A.R., The Last of Us.
• Pathfinding: A*, NavMesh, Recast/Detour – dynamic obstacle avoidance.
• Procedural Generation: Level layout (Minecraft, No Man's Sky), quests, loot.
• Dynamic Difficulty: Director AI (Left 4 Dead), adaptive enemy aggression.
• Companion / Squad AI: Cover selection, flanking, revive logic (Mass Effect, Ghost Recon).
• Believable Civilians: Schedules, needs, social interactions (Red Dead Redemption 2, The Sims).

Modern Trends

• Machine Learning: Neural nets for animation blending, anti-cheat, DLSS (not gameplay AI).
• LLM-driven NPCs: Experimental (e.g., Inworld, Convai) – runtime dialogue generation.

Game AI ≠ General AI; it's authored, deterministic systems tuned for fun, not sentience.