diff --git a/BizHawk.Emulation/Consoles/PC Engine/Compat.txt b/BizHawk.Emulation/Consoles/PC Engine/Compat.txt
index 8bbfb46d6c..9681043f30 100644
--- a/BizHawk.Emulation/Consoles/PC Engine/Compat.txt	
+++ b/BizHawk.Emulation/Consoles/PC Engine/Compat.txt	
@@ -17,7 +17,6 @@ Coryoon           - Recent VDC updates broke scrolling. Generally timing sensiti
 Cross Wiber       - Minor; Raster on wrong line
 Davis Cup Tennis  - Some timing issue, splash screen is too slow
 Dungeon Explorer  - Freeze in 'intro'
-Fighting Run      - Requires 4-color mode emulation of MWR register
 Legend of Hero Ton- Slight gfx- check top of screen
 Lode Runner       - Freezes in new game 
 Madoo Granzort    - Graphics issues because SGX VPC renderer is not using new frame timing
diff --git a/BizHawk.Emulation/Consoles/PC Engine/VDC.Render.cs b/BizHawk.Emulation/Consoles/PC Engine/VDC.Render.cs
index 3ee1f6ec89..ede55e87a8 100644
--- a/BizHawk.Emulation/Consoles/PC Engine/VDC.Render.cs	
+++ b/BizHawk.Emulation/Consoles/PC Engine/VDC.Render.cs	
@@ -26,7 +26,7 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
 
         public void ExecFrame(bool render)
         {
-            for (ScanLine = 0; ScanLine < 263;)
+            for (ScanLine = 0; ScanLine < 263; )
             {
                 latchedDisplayStartLine = DisplayStartLine;
                 ActiveLine = ScanLine - latchedDisplayStartLine;
@@ -110,7 +110,7 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
 
                 if ((Registers[DCR] & 1) > 0)
                 {
-                    Log.Note("VDC","FIRING SATB DMA COMPLETION IRQ");
+                    Log.Note("VDC", "FIRING SATB DMA COMPLETION IRQ");
                     StatusByte |= StatusVramSatDmaComplete;
                     cpu.IRQ1Assert = true;
                 }
@@ -167,6 +167,7 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
                 return;
 
             Array.Clear(InterSpritePriorityBuffer, 0, FrameWidth);
+            bool Sprite4ColorMode = Sprite4ColorModeEnabled;
 
             for (int i = 0; i < 64; i++)
             {
@@ -185,6 +186,15 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
                 bool hflip = (flags & 0x0800) != 0;
                 bool vflip = (flags & 0x8000) != 0;
 
+                int colorMask = 0xFF;
+                if (Sprite4ColorMode)
+                {
+                    if ((SpriteAttributeTable[(i * 4) + 2] & 1) == 0)
+                        colorMask = 0x03;
+                    else
+                        colorMask = 0x0C;
+                }
+
                 if (width == 32)
                     patternNo &= 0x1FE;
 
@@ -259,7 +269,9 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
                     {
                         for (int xs = x >= 0 ? x : 0; xs < x + 16 && xs >= 0 && xs < FrameWidth; xs++)
                         {
-                            byte pixel = SpriteBuffer[(patternNo * 256) + (yofs * 16) + (xs - x)];
+                            byte pixel = (byte)(SpriteBuffer[(patternNo * 256) + (yofs * 16) + (xs - x)] & colorMask);
+                            if (colorMask == 0x0C)
+                                pixel >>= 2;
                             if (pixel != 0 && InterSpritePriorityBuffer[xs] == 0)
                             {
                                 InterSpritePriorityBuffer[xs] = 1;
@@ -274,7 +286,9 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
                         x += 16;
                         for (int xs = x >= 0 ? x : 0; xs < x + 16 && xs >= 0 && xs < FrameWidth; xs++)
                         {
-                            byte pixel = SpriteBuffer[(patternNo * 256) + (yofs * 16) + (xs - x)];
+                            byte pixel = (byte)(SpriteBuffer[(patternNo * 256) + (yofs * 16) + (xs - x)] & colorMask);
+                            if (colorMask == 0x0C)
+                                pixel >>= 2;
                             if (pixel != 0 && InterSpritePriorityBuffer[xs] == 0)
                             {
                                 InterSpritePriorityBuffer[xs] = 1;
@@ -293,7 +307,9 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
                             patternNo++;
                         for (int xs = x >= 0 ? x : 0; xs < x + 16 && xs >= 0 && xs < FrameWidth; xs++)
                         {
-                            byte pixel = SpriteBuffer[(patternNo * 256) + (yofs * 16) + 15 - (xs - x)];
+                            byte pixel = (byte)(SpriteBuffer[(patternNo * 256) + (yofs * 16) + 15 - (xs - x)] & colorMask);
+                            if (colorMask == 0x0C)
+                                pixel >>= 2;
                             if (pixel != 0 && InterSpritePriorityBuffer[xs] == 0)
                             {
                                 InterSpritePriorityBuffer[xs] = 1;
@@ -307,7 +323,9 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
                             x += 16;
                             for (int xs = x >= 0 ? x : 0; xs < x + 16 && xs >= 0 && xs < FrameWidth; xs++)
                             {
-                                byte pixel = SpriteBuffer[(patternNo * 256) + (yofs * 16) + 15 - (xs - x)];
+                                byte pixel = (byte)(SpriteBuffer[(patternNo * 256) + (yofs * 16) + 15 - (xs - x)] & colorMask);
+                                if (colorMask == 0x0C)
+                                    pixel >>= 2;
                                 if (pixel != 0 && InterSpritePriorityBuffer[xs] == 0)
                                 {
                                     InterSpritePriorityBuffer[xs] = 1;
diff --git a/BizHawk.Emulation/Consoles/PC Engine/VDC.cs b/BizHawk.Emulation/Consoles/PC Engine/VDC.cs
index 33a1114301..e66c0a6b89 100644
--- a/BizHawk.Emulation/Consoles/PC Engine/VDC.cs	
+++ b/BizHawk.Emulation/Consoles/PC Engine/VDC.cs	
@@ -41,6 +41,7 @@ namespace BizHawk.Emulation.Consoles.TurboGrafx
         public bool RasterCompareInterruptEnabled   { get { return (Registers[CR] & 0x04) != 0; } }
         public bool SpriteOverflowInterruptEnabled  { get { return (Registers[CR] & 0x02) != 0; } }
         public bool SpriteCollisionInterruptEnabled { get { return (Registers[CR] & 0x01) != 0; } }
+        public bool Sprite4ColorModeEnabled         { get { return (Registers[MWR] & 0x0C) != 0; } }
 
         public int BatWidth  { get { switch((Registers[MWR] >> 4) & 3) { case 0: return 32; case 1: return 64; default: return 128; } } }
         public int BatHeight { get { return ((Registers[MWR] & 0x40) == 0) ? 32 : 64; } }