diff --git a/apps/openmw/mwmechanics/aiactivate.hpp b/apps/openmw/mwmechanics/aiactivate.hpp
index 8de4be69f..4cc9f3036 100644
--- a/apps/openmw/mwmechanics/aiactivate.hpp
+++ b/apps/openmw/mwmechanics/aiactivate.hpp
@@ -19,7 +19,7 @@ namespace MWMechanics
 {
     /// \brief Causes actor to walk to activatable object and activate it
     /** Will activate when close to object **/
-    class AiActivate : public AiPackage
+    class AiActivate final : public AiPackage
     {
         public:
             /// Constructor
@@ -28,11 +28,11 @@ namespace MWMechanics
 
             AiActivate(const ESM::AiSequence::AiActivate* activate);
 
-            virtual AiActivate *clone() const;
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
-            virtual int getTypeId() const;
+            AiActivate *clone() const final;
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
+            int getTypeId() const final;
 
-            virtual void writeState(ESM::AiSequence::AiSequence& sequence) const;
+            void writeState(ESM::AiSequence::AiSequence& sequence) const final;
 
         private:
             std::string mObjectId;
diff --git a/apps/openmw/mwmechanics/aiavoiddoor.hpp b/apps/openmw/mwmechanics/aiavoiddoor.hpp
index 4c8be29eb..39a78192b 100644
--- a/apps/openmw/mwmechanics/aiavoiddoor.hpp
+++ b/apps/openmw/mwmechanics/aiavoiddoor.hpp
@@ -16,22 +16,22 @@ namespace MWMechanics
     /// \brief AiPackage to have an actor avoid an opening door
     /** The AI will retreat from the door until it has finished opening, walked far away from it, or one second has passed, in an attempt to avoid it
     **/
-    class AiAvoidDoor : public AiPackage
+    class AiAvoidDoor final : public AiPackage
     {
         public:
             /// Avoid door until the door is fully open
             AiAvoidDoor(const MWWorld::ConstPtr& doorPtr);
 
-            virtual AiAvoidDoor *clone() const;
+            AiAvoidDoor *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual unsigned int getPriority() const;
+            unsigned int getPriority() const final;
 
-            virtual bool canCancel() const { return false; }
-            virtual bool shouldCancelPreviousAi() const { return false; }
+            bool canCancel() const final { return false; }
+            bool shouldCancelPreviousAi() const final { return false; }
 
         private:
             float mDuration;
diff --git a/apps/openmw/mwmechanics/aibreathe.hpp b/apps/openmw/mwmechanics/aibreathe.hpp
index 263ab8c2b..daa2782c2 100644
--- a/apps/openmw/mwmechanics/aibreathe.hpp
+++ b/apps/openmw/mwmechanics/aibreathe.hpp
@@ -7,21 +7,21 @@ namespace MWMechanics
 {
     /// \brief AiPackage to have an actor resurface to breathe
     // The AI will go up if lesser than half breath left
-    class AiBreathe : public AiPackage
+    class AiBreathe final : public AiPackage
     {
         public:
             AiBreathe();
 
-            virtual AiBreathe *clone() const;
+            AiBreathe *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual unsigned int getPriority() const;
+            unsigned int getPriority() const final;
 
-            virtual bool canCancel() const { return false; }
-            virtual bool shouldCancelPreviousAi() const { return false; }
+            bool canCancel() const final { return false; }
+            bool shouldCancelPreviousAi() const final { return false; }
     };
 }
 #endif
diff --git a/apps/openmw/mwmechanics/aicast.hpp b/apps/openmw/mwmechanics/aicast.hpp
index 7128fe7a2..6b10370c6 100644
--- a/apps/openmw/mwmechanics/aicast.hpp
+++ b/apps/openmw/mwmechanics/aicast.hpp
@@ -11,22 +11,22 @@ namespace MWWorld
 namespace MWMechanics
 {
     /// AiPackage which makes an actor to cast given spell.
-    class AiCast : public AiPackage {
+    class AiCast final : public AiPackage {
         public:
             AiCast(const std::string& targetId, const std::string& spellId, bool manualSpell=false);
 
-            virtual AiPackage *clone() const;
+            AiPackage *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual MWWorld::Ptr getTarget() const;
+            MWWorld::Ptr getTarget() const final;
 
-            virtual unsigned int getPriority() const;
+            unsigned int getPriority() const final;
 
-            virtual bool canCancel() const { return false; }
-            virtual bool shouldCancelPreviousAi() const { return false; }
+            bool canCancel() const final { return false; }
+            bool shouldCancelPreviousAi() const final { return false; }
 
         private:
             std::string mTargetId;
diff --git a/apps/openmw/mwmechanics/aicombat.hpp b/apps/openmw/mwmechanics/aicombat.hpp
index f89e71678..049857e71 100644
--- a/apps/openmw/mwmechanics/aicombat.hpp
+++ b/apps/openmw/mwmechanics/aicombat.hpp
@@ -91,7 +91,7 @@ namespace MWMechanics
     };
 
     /// \brief Causes the actor to fight another actor
-    class AiCombat : public AiPackage
+    class AiCombat final : public AiPackage
     {
         public:
             ///Constructor
@@ -102,21 +102,21 @@ namespace MWMechanics
 
             void init();
 
-            virtual AiCombat *clone() const;
+            AiCombat *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual unsigned int getPriority() const;
+            unsigned int getPriority() const final;
 
             ///Returns target ID
-            MWWorld::Ptr getTarget() const;
+            MWWorld::Ptr getTarget() const final;
 
-            virtual void writeState(ESM::AiSequence::AiSequence &sequence) const;
+            void writeState(ESM::AiSequence::AiSequence &sequence) const final;
 
-            virtual bool canCancel() const { return false; }
-            virtual bool shouldCancelPreviousAi() const { return false; }
+            bool canCancel() const final { return false; }
+            bool shouldCancelPreviousAi() const final { return false; }
 
         private:
             /// Returns true if combat should end
diff --git a/apps/openmw/mwmechanics/aiescort.hpp b/apps/openmw/mwmechanics/aiescort.hpp
index e4319b425..5b49807a2 100644
--- a/apps/openmw/mwmechanics/aiescort.hpp
+++ b/apps/openmw/mwmechanics/aiescort.hpp
@@ -16,7 +16,7 @@ namespace AiSequence
 namespace MWMechanics
 {
     /// \brief AI Package to have an NPC lead the player to a specific point
-    class AiEscort : public AiPackage
+    class AiEscort final : public AiPackage
     {
         public:
             /// Implementation of AiEscort
@@ -30,21 +30,21 @@ namespace MWMechanics
 
             AiEscort(const ESM::AiSequence::AiEscort* escort);
 
-            virtual AiEscort *clone() const;
+            AiEscort *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual bool useVariableSpeed() const { return true;}
+            bool useVariableSpeed() const final { return true; }
 
-            virtual bool sideWithTarget() const { return true; }
+            bool sideWithTarget() const final { return true; }
 
-            void writeState(ESM::AiSequence::AiSequence &sequence) const;
+            void writeState(ESM::AiSequence::AiSequence &sequence) const final;
 
-            void fastForward(const MWWorld::Ptr& actor, AiState& state);
+            void fastForward(const MWWorld::Ptr& actor, AiState& state) final;
 
-            virtual osg::Vec3f getDestination() const { return osg::Vec3f(mX, mY, mZ); }
+            osg::Vec3f getDestination() const final { return osg::Vec3f(mX, mY, mZ); }
 
         private:
             std::string mCellId;
diff --git a/apps/openmw/mwmechanics/aiface.hpp b/apps/openmw/mwmechanics/aiface.hpp
index 099e5d237..98d9ea04b 100644
--- a/apps/openmw/mwmechanics/aiface.hpp
+++ b/apps/openmw/mwmechanics/aiface.hpp
@@ -6,20 +6,20 @@
 namespace MWMechanics
 {
     /// AiPackage which makes an actor face a certain direction.
-    class AiFace : public AiPackage {
+    class AiFace final : public AiPackage {
         public:
             AiFace(float targetX, float targetY);
 
-            virtual AiPackage *clone() const;
+            AiPackage *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual unsigned int getPriority() const;
+            unsigned int getPriority() const final;
 
-            virtual bool canCancel() const { return false; }
-            virtual bool shouldCancelPreviousAi() const { return false; }
+            bool canCancel() const final { return false; }
+            bool shouldCancelPreviousAi() const final { return false; }
 
         private:
             float mTargetX, mTargetY;
diff --git a/apps/openmw/mwmechanics/aifollow.hpp b/apps/openmw/mwmechanics/aifollow.hpp
index 24263bbc0..fc4b7fc0b 100644
--- a/apps/openmw/mwmechanics/aifollow.hpp
+++ b/apps/openmw/mwmechanics/aifollow.hpp
@@ -39,7 +39,7 @@ namespace MWMechanics
     /// \brief AiPackage for an actor to follow another actor/the PC
     /** The AI will follow the target until a condition (time, or position) are set. Both can be disabled to cause the actor to follow the other indefinitely
     **/
-    class AiFollow : public AiPackage
+    class AiFollow final : public AiPackage
     {
         public:
             AiFollow(const std::string &actorId, float duration, float x, float y, float z);
@@ -53,30 +53,30 @@ namespace MWMechanics
 
             AiFollow(const ESM::AiSequence::AiFollow* follow);
 
-            virtual bool sideWithTarget() const { return true; }
-            virtual bool followTargetThroughDoors() const { return true; }
-            virtual bool shouldCancelPreviousAi() const { return !mCommanded; }
+            bool sideWithTarget() const final { return true; }
+            bool followTargetThroughDoors() const final { return true; }
+            bool shouldCancelPreviousAi() const final { return !mCommanded; }
 
-            virtual AiFollow *clone() const;
+            AiFollow *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual bool useVariableSpeed() const { return true;}
+            bool useVariableSpeed() const final { return true; }
 
             /// Returns the actor being followed
             std::string getFollowedActor();
 
-            virtual void writeState (ESM::AiSequence::AiSequence& sequence) const;
+            void writeState (ESM::AiSequence::AiSequence& sequence) const final;
 
             bool isCommanded() const;
 
             int getFollowIndex() const;
 
-            void fastForward(const MWWorld::Ptr& actor, AiState& state);
+            void fastForward(const MWWorld::Ptr& actor, AiState& state) final;
 
-            virtual osg::Vec3f getDestination() const
+            osg::Vec3f getDestination() const final
             {
                 MWWorld::Ptr target = getTarget();
                 if (target.isEmpty())
diff --git a/apps/openmw/mwmechanics/aipursue.hpp b/apps/openmw/mwmechanics/aipursue.hpp
index ea83a10e5..3f2c2923e 100644
--- a/apps/openmw/mwmechanics/aipursue.hpp
+++ b/apps/openmw/mwmechanics/aipursue.hpp
@@ -17,7 +17,7 @@ namespace MWMechanics
     /** Used for arresting players. Causes the actor to run to the pursued actor and activate them, to arrest them.
         Note that while very similar to AiActivate, it will ONLY activate when evry close to target (Not also when the
         path is completed). **/
-    class AiPursue : public AiPackage
+    class AiPursue final : public AiPackage
     {
         public:
             ///Constructor
@@ -26,16 +26,16 @@ namespace MWMechanics
 
             AiPursue(const ESM::AiSequence::AiPursue* pursue);
 
-            virtual AiPursue *clone() const;
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
-            virtual int getTypeId() const;
+            AiPursue *clone() const final;
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
+            int getTypeId() const final;
 
-            MWWorld::Ptr getTarget() const;
+            MWWorld::Ptr getTarget() const final;
 
-            virtual void writeState (ESM::AiSequence::AiSequence& sequence) const;
+            void writeState (ESM::AiSequence::AiSequence& sequence) const final;
 
-            virtual bool canCancel() const { return false; }
-            virtual bool shouldCancelPreviousAi() const { return false; }
+            bool canCancel() const final { return false; }
+            bool shouldCancelPreviousAi() const final { return false; }
     };
 }
 #endif
diff --git a/apps/openmw/mwmechanics/aitravel.hpp b/apps/openmw/mwmechanics/aitravel.hpp
index e7895462f..43b6c9d16 100644
--- a/apps/openmw/mwmechanics/aitravel.hpp
+++ b/apps/openmw/mwmechanics/aitravel.hpp
@@ -14,7 +14,7 @@ namespace AiSequence
 namespace MWMechanics
 {
     /// \brief Causes the AI to travel to the specified point
-    class AiTravel : public AiPackage
+    class AiTravel final : public AiPackage
     {
         public:
             /// Default constructor
@@ -22,21 +22,21 @@ namespace MWMechanics
             AiTravel(const ESM::AiSequence::AiTravel* travel);
 
             /// Simulates the passing of time
-            virtual void fastForward(const MWWorld::Ptr& actor, AiState& state);
+            void fastForward(const MWWorld::Ptr& actor, AiState& state) final;
 
-            void writeState(ESM::AiSequence::AiSequence &sequence) const;
+            void writeState(ESM::AiSequence::AiSequence &sequence) const final;
 
-            virtual AiTravel *clone() const;
+            AiTravel *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual bool useVariableSpeed() const { return true;}
+            bool useVariableSpeed() const final { return true; }
 
-            virtual bool alwaysActive() const { return true; }
+            bool alwaysActive() const final { return true; }
 
-            virtual osg::Vec3f getDestination() const { return osg::Vec3f(mX, mY, mZ); }
+            osg::Vec3f getDestination() const final { return osg::Vec3f(mX, mY, mZ); }
 
         private:
             float mX;
diff --git a/apps/openmw/mwmechanics/aiwander.hpp b/apps/openmw/mwmechanics/aiwander.hpp
index 6e69b6c79..f6e7f6d0c 100644
--- a/apps/openmw/mwmechanics/aiwander.hpp
+++ b/apps/openmw/mwmechanics/aiwander.hpp
@@ -78,7 +78,7 @@ namespace MWMechanics
     };
 
     /// \brief Causes the Actor to wander within a specified range
-    class AiWander : public AiPackage
+    class AiWander final : public AiPackage
     {
         public:
             /// Constructor
@@ -91,23 +91,23 @@ namespace MWMechanics
 
             AiWander (const ESM::AiSequence::AiWander* wander);
 
-            virtual AiPackage *clone() const;
+            AiPackage *clone() const final;
 
-            virtual bool execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration);
+            bool execute(const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration) final;
 
-            virtual int getTypeId() const;
+            int getTypeId() const final;
 
-            virtual bool useVariableSpeed() const { return true;}
+            bool useVariableSpeed() const final { return true; }
 
-            virtual void writeState(ESM::AiSequence::AiSequence &sequence) const;
+            void writeState(ESM::AiSequence::AiSequence &sequence) const final;
 
-            virtual void fastForward(const MWWorld::Ptr& actor, AiState& state);
+            void fastForward(const MWWorld::Ptr& actor, AiState& state) final;
 
-            bool getRepeat() const;
+            bool getRepeat() const final;
 
-            osg::Vec3f getDestination(const MWWorld::Ptr& actor) const;
+            osg::Vec3f getDestination(const MWWorld::Ptr& actor) const final;
 
-            virtual osg::Vec3f getDestination() const
+            osg::Vec3f getDestination() const final
             {
                 if (!mHasDestination)
                     return osg::Vec3f(0, 0, 0);