open world thriller game

I have designed the mission logic and AI states for the 'Dockyard Infiltration' mission. The implementation uses a modular approach with a dedicated MissionController and an AlertState enum for the guards.

Dockyard Infiltration System

Mission Design

• Objective: Infiltrate the high-security zone, retrieve 'Item_Ledger', and reach the getaway van.
• Stealth Mechanics: Visibility based on light levels; noise generated by sprinting near guards.
• Failure Condition: Player death or guards triggering a 'Lockdown' state before the ledger is secured.

Implementation (Unity/C#)

// GuardAI.cs - Awareness Logic
public enum AwarenessState { Idle, Suspicious, Searching, Combat }

public class GuardAI : MonoBehaviour {
    public AwarenessState currentState = AwarenessState.Idle;
    [SerializeField] private float detectionMeter = 0f;
    [SerializeField] private Transform[] patrolPoints;

    void Update() {
        switch (currentState) {
            case AwarenessState.Idle: Patrol(); break;
            case AwarenessState.Suspicious: InvestigateNoise(); break;
            case AwarenessState.Searching: SearchArea(); break;
            case AwarenessState.Combat: EngagePlayer(); break;
        }
    }

    public void OnDetectPlayer(float amount) {
        detectionMeter += amount * Time.deltaTime;
        if (detectionMeter > 50f) currentState = AwarenessState.Suspicious;
        if (detectionMeter >= 100f) currentState = AwarenessState.Combat;
    }
}

// MissionManager.cs - Objective Tracking
public class MissionManager : MonoBehaviour {
    public bool hasLedger = false;
    public GameObject getawayVehicle;

    public void OnLedgerStolen() {
        hasLedger = true;
        ActivateExtraction();
    }

    private void ActivateExtraction() {
        getawayVehicle.GetComponent<VehicleController>().IsInteractable = true;
        Debug.Log("Extraction point active at the North Dock.");
    }
}

Next steps

1. Attach the GuardAI script to your NPC prefabs and assign patrol Waypoints.
2. Place a Trigger Collider on the Ledger item to call OnLedgerStolen().
3. Configure the getawayVehicle reference in the Inspector to enable the escape sequence.