diff --git a/Assets/Scenes/Main.unity b/Assets/Scenes/Main.unity
index 4a9d8fcf022820c326994f9a8846bb46f7301719..2da717755f3944d7345c55d72c24db902eb4f0bd 100644
--- a/Assets/Scenes/Main.unity
+++ b/Assets/Scenes/Main.unity
@@ -2552,6 +2552,55 @@ CanvasRenderer:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 1038376789}
   m_CullTransparentMesh: 1
+--- !u!1 &1124016427
+GameObject:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  serializedVersion: 6
+  m_Component:
+  - component: {fileID: 1124016429}
+  - component: {fileID: 1124016428}
+  m_Layer: 0
+  m_Name: Enemy
+  m_TagString: Untagged
+  m_Icon: {fileID: 0}
+  m_NavMeshLayer: 0
+  m_StaticEditorFlags: 0
+  m_IsActive: 1
+--- !u!114 &1124016428
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1124016427}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: aa10cc87aff30c04dbe0aa648f5b6adc, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  startingHealth: 100
+  sinkSpeed: 2.5
+  scoreValue: 10
+  deathClip: {fileID: 0}
+  isCheatOneHitKill: 0
+--- !u!4 &1124016429
+Transform:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 1124016427}
+  serializedVersion: 2
+  m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
+  m_LocalPosition: {x: 638.0238, y: 287.54834, z: 8.902347}
+  m_LocalScale: {x: 1, y: 1, z: 1}
+  m_ConstrainProportionsScale: 0
+  m_Children: []
+  m_Father: {fileID: 0}
+  m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!1 &1125301618
 GameObject:
   m_ObjectHideFlags: 0
@@ -4611,6 +4660,7 @@ SceneRoots:
   m_ObjectHideFlags: 0
   m_Roots:
   - {fileID: 1851598982}
+  - {fileID: 1124016429}
   - {fileID: 1641232233}
   - {fileID: 1139190134}
   - {fileID: 244922607}
diff --git a/Assets/Scripts/Enemy/EnemyHealth.cs b/Assets/Scripts/Enemy/EnemyHealth.cs
index 947fe84c2378e7935375a2aba8251babe992f3c6..4be00f9aa69918788253ccf1e45bc279e129f59b 100644
--- a/Assets/Scripts/Enemy/EnemyHealth.cs
+++ b/Assets/Scripts/Enemy/EnemyHealth.cs
@@ -16,6 +16,10 @@ namespace Nightmare
         CapsuleCollider capsuleCollider;
         EnemyMovement enemyMovement;
 
+        // Cheat One Hit Kill
+        public bool isCheatOneHitKill = false;
+        public static bool IsActiveCheatOneHitKill = false; // For indicator to change isCheatOneHitKill
+
         void Awake ()
         {
             anim = GetComponent <Animator> ();
@@ -39,6 +43,8 @@ namespace Nightmare
 
         void Update ()
         {
+            SetCheatOneHitKill(IsActiveCheatOneHitKill);
+
             if (IsDead())
             {
                 transform.Translate (-Vector3.up * sinkSpeed * Time.deltaTime);
@@ -54,14 +60,36 @@ namespace Nightmare
             return (currentHealth <= 0f);
         }
 
+        // Activate or deactivate cheat one hit kill
+        public void SetCheatOneHitKill(bool isActive)
+        {
+            // Get an array of all EnemyHealth scripts
+            EnemyHealth[] allEnemies = FindObjectsOfType<EnemyHealth>();
+
+            // Loop and set isCheatOneHitKill to true on each enemy
+            foreach (EnemyHealth eHealth in allEnemies)
+            {
+                eHealth.isCheatOneHitKill = isActive;
+            }
+
+            // Change indicator
+            IsActiveCheatOneHitKill = isActive;
+        }
+
         public void TakeDamage (int amount, Vector3 hitPoint)
         {
             if (!IsDead())
-            {
+            {  
+                // Cheat one hit kill
+                if (isCheatOneHitKill)
+                {
+                    currentHealth = 0;
+                }
+
                 enemyAudio.Play();
                 currentHealth -= amount;
 
-                if (IsDead())
+                if (currentHealth <= 0)
                 {
                     Death();
                 }
diff --git a/Assets/Scripts/Managers/CheatManager.cs b/Assets/Scripts/Managers/CheatManager.cs
index a023b90a4b0f3ae3442e8b6d55f1499afea29555..62eb488421e6de3b7b95b084483e8fcb4b01e57a 100644
--- a/Assets/Scripts/Managers/CheatManager.cs
+++ b/Assets/Scripts/Managers/CheatManager.cs
@@ -22,6 +22,7 @@ public class CheatManager : MonoBehaviour
     HUDisplay hud;
     PlayerHealth playerHealth;
     PlayerMovement playerMovement;
+    EnemyHealth enemyHealth;
     string textInput;
     public InputField inputField;
 
@@ -33,15 +34,20 @@ public class CheatManager : MonoBehaviour
         hud = GameObject.Find("HUDCanvas").GetComponent<HUDisplay>();
         playerHealth = GameObject.Find("Player").GetComponent<PlayerHealth>();
         playerMovement = GameObject.Find("Player").GetComponent<PlayerMovement>();
+        enemyHealth = GameObject.Find("Enemy").GetComponent<EnemyHealth>();
     }
 
     private void Update()
     {
-        if (UnityEngine.Input.GetKeyDown(KeyCode.Y)) // Open
+        // Reason: the read string conditionals do not contain Y or Z character
+        // Open input field by pressing Y key
+        if (UnityEngine.Input.GetKeyDown(KeyCode.Y)) 
         {
             hud.OpenInput();
         }
-        if (UnityEngine.Input.GetKeyDown(KeyCode.Z)) // Close
+
+        // Close input field by pressing Z key
+        if (UnityEngine.Input.GetKeyDown(KeyCode.Z)) 
         {
             hud.CloseInput();
         }
@@ -103,7 +109,9 @@ public class CheatManager : MonoBehaviour
 
     private void ActivateOneHitKill()
     {
-        // TODO
+        enemyHealth.SetCheatOneHitKill(true);
+        hud.OpenPanel("One Hit Kill Cheat Activated!");
+        cheats[(int)CheatsType.ONEHITKILL] = true;
     }
 
     private void ActivateXTwoSpeed()
@@ -117,6 +125,7 @@ public class CheatManager : MonoBehaviour
     {
         playerHealth.SetCheatNoDamage(false);
         playerMovement.ResetSpeed();
+        enemyHealth.SetCheatOneHitKill(false);
         hud.OpenPanel("Successfully Reset Cheat(s)!");
     }