diff --git a/Subsurface/Barotrauma.csproj b/Subsurface/Barotrauma.csproj
index d8487f80e..d9ae80cc0 100644
--- a/Subsurface/Barotrauma.csproj
+++ b/Subsurface/Barotrauma.csproj
@@ -1049,6 +1049,9 @@
     <Content Include="Content\UI\uiIcons.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="Content\utg_4.mp4">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <Content Include="Content\waterbump.png">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
@@ -1648,6 +1651,9 @@
     <None Include="Content\Sounds\Water\WaterAmbience1.ogg">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
+    <None Include="Content\utg_4.xnb">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
     <None Include="Content\watershader.xnb">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
diff --git a/Subsurface/Content/Content.mgcb b/Subsurface/Content/Content.mgcb
index 3b1a5e869..48c1e7111 100644
--- a/Subsurface/Content/Content.mgcb
+++ b/Subsurface/Content/Content.mgcb
@@ -49,3 +49,8 @@
 /processorParam:DebugMode=Auto
 /build:damageshader.fx
 
+#begin utg_4.mp4
+/importer:H264Importer
+/processor:VideoProcessor
+/build:utg_4.mp4
+
diff --git a/Subsurface/Content/utg_4.mp4 b/Subsurface/Content/utg_4.mp4
new file mode 100644
index 000000000..1f606677d
Binary files /dev/null and b/Subsurface/Content/utg_4.mp4 differ
diff --git a/Subsurface/Content/utg_4.xnb b/Subsurface/Content/utg_4.xnb
new file mode 100644
index 000000000..a9e458b1b
Binary files /dev/null and b/Subsurface/Content/utg_4.xnb differ
diff --git a/Subsurface/Source/Camera.cs b/Subsurface/Source/Camera.cs
index dc04f3e7f..77dea4601 100644
--- a/Subsurface/Source/Camera.cs
+++ b/Subsurface/Source/Camera.cs
@@ -7,6 +7,8 @@ namespace Barotrauma
 {
     public class Camera
     {
+        public static bool FollowSub = true;
+
         const float DefaultZoom = 1.0f;
         const float ZoomSmoothness = 8.0f;
         const float MoveSmoothness = 8.0f;
@@ -186,7 +188,7 @@ namespace Barotrauma
                     if (GameMain.Config.KeyBind(InputType.Up).IsDown())     moveCam.Y += moveSpeed;
                 }
 
-                if (Screen.Selected == GameMain.GameScreen)
+                if (Screen.Selected == GameMain.GameScreen && FollowSub)
                 {
                     var closestSub = Submarine.FindClosest(WorldViewCenter);
                     if (closestSub != null)
diff --git a/Subsurface/Source/Characters/Character.cs b/Subsurface/Source/Characters/Character.cs
index 847cb072f..ab6ce84a7 100644
--- a/Subsurface/Source/Characters/Character.cs
+++ b/Subsurface/Source/Characters/Character.cs
@@ -1588,6 +1588,8 @@ namespace Barotrauma
             Vector2 closestItemPos = closestItem != null ? closestItem.DrawPosition : Vector2.Zero;
             closestItemPos.Y = -closestItemPos.Y;
             GUI.DrawLine(spriteBatch, closestItemPos - new Vector2(0, 5), closestItemPos + new Vector2(0, 5), Color.Lime, 0, 10);
+
+            if (this == controlled || GUI.DisableHUD) return;
             
             Vector2 pos = DrawPosition;
             pos.Y = -pos.Y;
@@ -1601,7 +1603,6 @@ namespace Barotrauma
 
             if (this == controlled) return;
 
-
             if (info != null)
             {
                 Vector2 namePos = new Vector2(pos.X, pos.Y - 110.0f - (5.0f / cam.Zoom)) - GUI.Font.MeasureString(Info.Name) * 0.5f / cam.Zoom;
diff --git a/Subsurface/Source/Characters/CharacterHUD.cs b/Subsurface/Source/Characters/CharacterHUD.cs
index 8f81e6214..39a3156a3 100644
--- a/Subsurface/Source/Characters/CharacterHUD.cs
+++ b/Subsurface/Source/Characters/CharacterHUD.cs
@@ -34,6 +34,8 @@ namespace Barotrauma
 
         public static void AddToGUIUpdateList(Character character)
         {
+            if (GUI.DisableHUD) return;
+
             if (cprButton != null && cprButton.Visible) cprButton.AddToGUIUpdateList();
 
             if (suicideButton != null && suicideButton.Visible) suicideButton.AddToGUIUpdateList();
@@ -118,6 +120,8 @@ namespace Barotrauma
                 damageOverlay = new Sprite("Content/UI/damageOverlay.png", Vector2.Zero);
             }
 
+            if (GUI.DisableHUD) return;
+
             if (character.Inventory != null)
             {
                 for (int i = 0; i < character.Inventory.Items.Length - 1; i++)
diff --git a/Subsurface/Source/DebugConsole.cs b/Subsurface/Source/DebugConsole.cs
index 0cb827891..96b064fac 100644
--- a/Subsurface/Source/DebugConsole.cs
+++ b/Subsurface/Source/DebugConsole.cs
@@ -510,6 +510,12 @@ namespace Barotrauma
 
                     Submarine.MainSub.GodMode = !Submarine.MainSub.GodMode;
                     break;
+                case "lockx":
+                    Submarine.LockX = !Submarine.LockX;
+                    break;
+                case "locky":
+                    Submarine.LockY = !Submarine.LockY;
+                    break;
                 case "dumpids":
                     try
                     {
@@ -683,6 +689,14 @@ namespace Barotrauma
                 case "debugdraw":
                     GameMain.DebugDraw = !GameMain.DebugDraw;
                     break;
+                case "disablehud":
+                case "hud":
+                    GUI.DisableHUD = !GUI.DisableHUD;
+                    GameMain.Instance.IsMouseVisible = !GameMain.Instance.IsMouseVisible;
+                    break;
+                case "followsub":
+                    Camera.FollowSub = !Camera.FollowSub;
+                    break;
                 case "drawaitargets":
                 case "showaitargets":
                     AITarget.ShowAITargets = !AITarget.ShowAITargets;
diff --git a/Subsurface/Source/GUI/GUI.cs b/Subsurface/Source/GUI/GUI.cs
index ed3373261..18723768d 100644
--- a/Subsurface/Source/GUI/GUI.cs
+++ b/Subsurface/Source/GUI/GUI.cs
@@ -64,6 +64,8 @@ namespace Barotrauma
             get { return arrow; }
         }
 
+        public static bool DisableHUD;
+
         public static void Init(ContentManager content)
         {
             Font = ToolBox.TryLoadFont("SpriteFont1", content);
@@ -497,8 +499,9 @@ namespace Barotrauma
             DebugConsole.Draw(spriteBatch);
             
             if (GUIComponent.MouseOn != null && !string.IsNullOrWhiteSpace(GUIComponent.MouseOn.ToolTip)) GUIComponent.MouseOn.DrawToolTip(spriteBatch);
-
-            cursor.Draw(spriteBatch, PlayerInput.LatestMousePosition);
+            
+            if (!GUI.DisableHUD)
+                cursor.Draw(spriteBatch, PlayerInput.LatestMousePosition);            
         }
 
         public static void AddToGUIUpdateList()
diff --git a/Subsurface/Source/GUI/LoadingScreen.cs b/Subsurface/Source/GUI/LoadingScreen.cs
index b30e1b720..f635b71f2 100644
--- a/Subsurface/Source/GUI/LoadingScreen.cs
+++ b/Subsurface/Source/GUI/LoadingScreen.cs
@@ -1,6 +1,7 @@
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
+using Microsoft.Xna.Framework.Media;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -23,6 +24,9 @@ namespace Barotrauma
         
         private float? loadState;
 
+        Video splashScreenVideo;
+        VideoPlayer videoPlayer;
+        
         public Vector2 TitleSize
         {
             get { return new Vector2(titleTexture.Width, titleTexture.Height); }
@@ -49,10 +53,23 @@ namespace Barotrauma
             get;
             set;
         }
-        
 
         public LoadingScreen(GraphicsDevice graphics)
         {
+            if (GameMain.Config.EnableSplashScreen)
+            {
+                try
+                {
+                    splashScreenVideo = GameMain.Instance.Content.Load<Video>("utg_4"); 
+                } 
+              
+                catch (Exception e)
+                {
+                    DebugConsole.ThrowError("Failed to load splashscreen", e);
+                    GameMain.Config.EnableSplashScreen = false;
+                }
+            }
+
             backgroundTexture = TextureLoader.FromFile("Content/UI/titleBackground.png");
             monsterTexture = TextureLoader.FromFile("Content/UI/titleMonster.png");
             titleTexture = TextureLoader.FromFile("Content/UI/titleText.png");
@@ -65,6 +82,21 @@ namespace Barotrauma
         
         public void Draw(SpriteBatch spriteBatch, GraphicsDevice graphics, float deltaTime)
         {
+            if (GameMain.Config.EnableSplashScreen && splashScreenVideo != null)
+            {
+                try
+                {
+                    DrawSplashScreen(spriteBatch);
+                    if (videoPlayer != null && videoPlayer.State == MediaState.Playing)
+                        return;
+                }
+                catch (Exception e)
+                {
+                    DebugConsole.ThrowError("Playing splash screen video failed", e);
+                    GameMain.Config.EnableSplashScreen = false;
+                }
+            }
+                        
             drawn = true;
 
             graphics.SetRenderTarget(renderTarget);
@@ -139,14 +171,42 @@ namespace Barotrauma
 
         }
 
-        /*public void Update()
+        private void DrawSplashScreen(SpriteBatch spriteBatch)
         {
-            if (Hull.renderer != null)
+            if (videoPlayer == null)
             {
-                Hull.renderer.ScrollWater();
+                videoPlayer = new VideoPlayer();
+                videoPlayer.Play(splashScreenVideo);
             }
-        }*/
+            else
+            {
+                Texture2D videoTexture = null;
 
+                if (videoPlayer.State == MediaState.Stopped)
+                {
+                    videoPlayer.Dispose();
+                    videoPlayer = null;
+
+                    splashScreenVideo.Dispose();
+                    splashScreenVideo = null;
+                }
+                else
+                {
+                    videoTexture = videoPlayer.GetTexture();
+
+                    spriteBatch.Begin();
+                    spriteBatch.Draw(videoTexture, new Rectangle(0, 0, GameMain.GraphicsWidth, GameMain.GraphicsHeight), Color.White);
+                    spriteBatch.End();
+
+                    if (PlayerInput.KeyHit(Keys.Space) || PlayerInput.KeyHit(Keys.Enter) || PlayerInput.LeftButtonDown())
+                    {
+                        videoPlayer.Stop();
+                    }
+                }
+
+            }
+        }
+ 
         bool drawn;
         public IEnumerable<object> DoLoading(IEnumerable<object> loader)
         {
diff --git a/Subsurface/Source/GameSession/GameModes/SinglePlayerMode.cs b/Subsurface/Source/GameSession/GameModes/SinglePlayerMode.cs
index 685d2ffde..b543446d8 100644
--- a/Subsurface/Source/GameSession/GameModes/SinglePlayerMode.cs
+++ b/Subsurface/Source/GameSession/GameModes/SinglePlayerMode.cs
@@ -183,7 +183,7 @@ namespace Barotrauma
 
         public override void Draw(SpriteBatch spriteBatch)
         {
-            if (!isRunning) return;
+            if (!isRunning|| GUI.DisableHUD) return;
 
             CrewManager.Draw(spriteBatch);
 
@@ -228,7 +228,7 @@ namespace Barotrauma
 
         public override void Update(float deltaTime)
         {
-            if (!isRunning) return;
+            if (!isRunning || GUI.DisableHUD) return;
 
             base.Update(deltaTime);
 
diff --git a/Subsurface/Source/GameSession/GameSession.cs b/Subsurface/Source/GameSession/GameSession.cs
index acfcc27a8..47a1bc900 100644
--- a/Subsurface/Source/GameSession/GameSession.cs
+++ b/Subsurface/Source/GameSession/GameSession.cs
@@ -376,6 +376,8 @@ namespace Barotrauma
         public void Update(float deltaTime)
         {
             TaskManager.Update(deltaTime);
+
+            if (GUI.DisableHUD) return;
             
             //guiRoot.Update(deltaTime);
             infoButton.Update(deltaTime);
@@ -387,6 +389,8 @@ namespace Barotrauma
 
         public void Draw(SpriteBatch spriteBatch)
         {
+            if (GUI.DisableHUD) return;
+
             infoButton.Draw(spriteBatch);
             
             if (gameMode != null)   gameMode.Draw(spriteBatch);
diff --git a/Subsurface/Source/GameSettings.cs b/Subsurface/Source/GameSettings.cs
index 942441dc5..695a02283 100644
--- a/Subsurface/Source/GameSettings.cs
+++ b/Subsurface/Source/GameSettings.cs
@@ -62,6 +62,8 @@ namespace Barotrauma
 
         public static bool VerboseLogging { get; set; }
 
+        public bool EnableSplashScreen { get; set; }
+
         public bool UnsavedSettings
         {
             get
@@ -154,6 +156,8 @@ namespace Barotrauma
 
             VerboseLogging = ToolBox.GetAttributeBool(doc.Root, "verboselogging", false);
 
+            EnableSplashScreen = ToolBox.GetAttributeBool(doc.Root, "enablesplashscreen", true);
+
             keyMapping = new KeyOrMouse[Enum.GetNames(typeof(InputType)).Length];
             keyMapping[(int)InputType.Up]       = new KeyOrMouse(Keys.W);
             keyMapping[(int)InputType.Down]     = new KeyOrMouse(Keys.S);
@@ -236,7 +240,8 @@ namespace Barotrauma
                 new XAttribute("autocheckupdates", AutoCheckUpdates),
                 new XAttribute("musicvolume", musicVolume),
                 new XAttribute("soundvolume", soundVolume),
-                new XAttribute("verboselogging", VerboseLogging));
+                new XAttribute("verboselogging", VerboseLogging),
+                new XAttribute("enablesplashscreen", EnableSplashScreen));
 
             if (WasGameUpdated)
             {
diff --git a/Subsurface/Source/Map/FireSource.cs b/Subsurface/Source/Map/FireSource.cs
index 2085403db..c8defcb9e 100644
--- a/Subsurface/Source/Map/FireSource.cs
+++ b/Subsurface/Source/Map/FireSource.cs
@@ -348,8 +348,16 @@ namespace Barotrauma
         {
             lightSource.Remove();
 
-            if (basicSoundIndex > -1) Sounds.SoundManager.Stop(basicSoundIndex);
-            if (largeSoundIndex > -1) Sounds.SoundManager.Stop(largeSoundIndex);
+            if (basicSoundIndex > -1)
+            {
+                Sounds.SoundManager.Stop(basicSoundIndex);
+                basicSoundIndex = -1;
+            }
+            if (largeSoundIndex > -1)
+            {
+                Sounds.SoundManager.Stop(largeSoundIndex);
+                largeSoundIndex = -1;
+            }
 
             hull.RemoveFire(this);
         }
diff --git a/Subsurface/Source/Map/Submarine.cs b/Subsurface/Source/Map/Submarine.cs
index f93a9f7b4..72db303b5 100644
--- a/Subsurface/Source/Map/Submarine.cs
+++ b/Subsurface/Source/Map/Submarine.cs
@@ -49,6 +49,8 @@ namespace Barotrauma
             private set;
         }
 
+        public static bool LockX, LockY;
+
         public static List<Submarine> SavedSubmarines = new List<Submarine>();
         
         public static readonly Vector2 GridSize = new Vector2(16.0f, 16.0f);
@@ -754,6 +756,11 @@ namespace Barotrauma
             if (Level.Loaded == null) return;
             
             if (subBody == null) return;
+
+            subBody.Body.LinearVelocity = new Vector2(
+                LockX ? 0.0f : subBody.Body.LinearVelocity.X, 
+                LockY ? 0.0f : subBody.Body.LinearVelocity.Y);
+            
             
             subBody.Update(deltaTime);
 
diff --git a/Subsurface/Source/Properties.cs b/Subsurface/Source/Properties.cs
index 222723051..18719ed9c 100644
--- a/Subsurface/Source/Properties.cs
+++ b/Subsurface/Source/Properties.cs
@@ -264,11 +264,11 @@ namespace Barotrauma
                 {
                     //only save 
                     //  - if the attribute is saveable and it's different from the default value
-                    //  - or can be changed in the editor
+                    //  - or can be changed in-game or in the editor
                     bool save = false;
                     foreach (var attribute in property.Attributes.OfType<HasDefaultValue>())
                     {
-                        if ((!attribute.isSaveable && !attribute.defaultValue.Equals(value)) || 
+                        if ((attribute.isSaveable && !attribute.defaultValue.Equals(value)) || 
                             property.Attributes.OfType<Editable>().Any())
                         {
                             save = true;
diff --git a/Subsurface/Source/Screens/GameScreen.cs b/Subsurface/Source/Screens/GameScreen.cs
index b4269a619..f86c848d9 100644
--- a/Subsurface/Source/Screens/GameScreen.cs
+++ b/Subsurface/Source/Screens/GameScreen.cs
@@ -215,7 +215,8 @@ namespace Barotrauma
 
             if (GameMain.GameSession != null) GameMain.GameSession.Draw(spriteBatch);
 
-            if (Character.Controlled == null && Submarine.MainSub != null) DrawSubmarineIndicator(spriteBatch, Submarine.MainSub);
+            if (Character.Controlled == null && Submarine.MainSub != null && !GUI.DisableHUD) 
+                DrawSubmarineIndicator(spriteBatch, Submarine.MainSub);
             
             GUI.Draw((float)deltaTime, spriteBatch, cam);