Enemy & NPC AI v1.0 - Free Download

Enemy&NPC AI is a fully modular, high-performance AI framework purpose-built to deliver intelligent, reactive enemy and NPC behaviors in Unity. Whether you're building a stealth-action game, open-world RPG, or third-person shooter, this system provides a complete foundation for AI behavior, combat, perception, and player interaction—without requiring custom AI code. Designed for extensibility and rapid development, it includes FSM-based behavior logic, perception systems, advanced combat, respawning, editor tooling, and customizable configurations via ScriptableObjects. Perfect for both solo developers and professional teams. Finite State Machine-Based Behavior System At the core is a robust FSM (Finite State Machine) architecture that enables dynamic transitions between states based on real-time data. Prebuilt, extensible states include: - Patrol (Loop, PingPong, Random) - Idle (wandering or animation-only) - Alert & Search (investigate last known location) - Chase (pathfinding + obstacle avoidance) - Combat (melee or ranged) - Flee (from player or threat) - Follow (companions, guards, escorts) - Dead (handles death and respawn)Each state is modular and override-ready, enabling tailored behaviors for specific enemy types or scenarios. Perception System: Vision, Hearing, and Stealth Simulate realistic AI awareness with combined raycast-based vision and dynamic hearing logic: - Field of View: Configurable radius and angle using raycasting - Hearing: Detects sounds such as footsteps, jumping, and attacks - Noise System: Player movement and actions emit sound for AI detection - StealthEvaluator: Automatically filters detection if the player is crouching, hidden, or behind obstacles - Real-time gizmo visualizations for tuning detection areas in-sceneSmart Combat & Hitbox System Deliver tactical and responsive AI combat using an advanced hitbox-driven attack system: - Melee and ranged attack logic (custom colliders or OverlapSphere) - Configurable WeaponData for multiple attack types, ranges, and cooldowns - Animation-based attacks with hit reaction support - Damage routing via hitboxes (e.g., headshots or limb-specific damage) - Real-time gizmos for attack range visualization - Seamless integration with Unity’s Animator systemPatrol and Navigation Logic Built-in navigation features ensure believable movement and route planning: - Configurable PatrolPath with Loop, PingPong, and Random modes - Wait times between points and smooth turning logic - Automatic return to patrol state after disengaging from the player - Full Unity NavMeshAgent support with off-mesh link compatibilityBehavior Configuration with ScriptableObjects Every behavior is driven by data, enabling rapid configuration and reuse: - EnemyAIConfigSO defines speed, perception ranges, attack types, animation triggers, thresholds, and more - Supports behavior presets like Hostile, Passive, Friendly, Chase-only, Attack-only, etc. - Future support for Faction system (team-based logic)Health, Damage & Respawning A centralized and modular health system allows for advanced combat feedback: - EnemyHealth manages hitpoints, invulnerability, respawn, and death triggers - Supports ragdoll or animated death states - Hitbox-specific damage routing (headshot, body, limbs) - Auto-respawn logic with timer-based delay - Optional UI integration for enemy health barsPowerful Editor Tools & Debugging Streamline development with integrated tooling and live debugging features: - Quick Setup Wizards for Player and AI configuration - Live FSM state tracking directly in the Inspector - In-scene gizmos for perception cones, hearing range, attack radii - Custom component inspectors with tooltips and error validation - FSM Graph view for visualizing behavior transitions (basic version) - Automatic tagging, layer assignment, and reference setupDesigned for Extensibility Built by developers, for developers—every system is open and customizable: - Modular C# code with interfaces and UnityEvents - Easily extend state machine behaviors, perception logic, and combat - Plug in custom animations, VFX, SFX, and audio via UnityEvents - Support for additive scenes, multiplayer logic, and runtime pooling