diff --git a/SabreTools.Library/DatFiles/DatFile.cs b/SabreTools.Library/DatFiles/DatFile.cs
index 095bdb90..96c2653d 100644
--- a/SabreTools.Library/DatFiles/DatFile.cs
+++ b/SabreTools.Library/DatFiles/DatFile.cs
@@ -263,6 +263,7 @@ namespace SabreTools.Library.DatFiles
         /// <param name="filter">Filter object to be passed to the DatItem level</param>
         /// <param name="updateFields">List of Fields representing what should be updated [only for base replacement]</param>
         /// <param name="onlySame">True if descriptions should only be replaced if the game name is the same, false otherwise [only for base replacement]</param>
+        /// <param name="byGame">True if diffing is by Game, false if diffing is by hash [only for against]</param>
         public void DetermineUpdateType(
             List<string> inputPaths,
             List<string> basePaths,
@@ -272,7 +273,8 @@ namespace SabreTools.Library.DatFiles
             bool skip,
             Filter filter,
             List<Field> updateFields,
-            bool onlySame)
+            bool onlySame,
+            bool byGame)
         {
             // Ensure we only have files in the inputs
             List<ParentablePath> inputFileNames = DirectoryExtensions.GetFilesOnly(inputPaths, appendparent: true);
@@ -319,12 +321,11 @@ namespace SabreTools.Library.DatFiles
             }
 
             // If we have a diff against mode
-            else if (updateMode.HasFlag(UpdateMode.DiffAgainst)
-                || updateMode.HasFlag(UpdateMode.DiffGame))
+            else if (updateMode.HasFlag(UpdateMode.DiffAgainst))
             {
                 // Populate the combined data
                 PopulateUserData(baseFileNames, filter);
-                DiffAgainst(inputFileNames, outDir, inplace, filter, updateMode.HasFlag(UpdateMode.DiffGame));
+                DiffAgainst(inputFileNames, outDir, inplace, filter, byGame);
             }
 
             // If we have one of the base replacement modes
diff --git a/SabreTools.Library/Data/Flags.cs b/SabreTools.Library/Data/Flags.cs
index 4942b59d..3684ad5b 100644
--- a/SabreTools.Library/Data/Flags.cs
+++ b/SabreTools.Library/Data/Flags.cs
@@ -257,12 +257,11 @@ namespace SabreTools.Library.Data
 
         // Base diffs
         DiffAgainst = 1 << 5,
-        DiffGame = 1 << 6,
 
         // Special update modes
-        Merge = 1 << 7,
-        BaseReplace = 1 << 8,
-        ReverseBaseReplace = 1 << 9,
+        Merge = 1 << 6,
+        BaseReplace = 1 << 7,
+        ReverseBaseReplace = 1 << 8,
 
         // Combinations
         AllDiffs = DiffDupesOnly | DiffNoDupesOnly | DiffIndividualsOnly,
diff --git a/SabreTools.Library/README.1ST b/SabreTools.Library/README.1ST
index de42a662..91062925 100644
--- a/SabreTools.Library/README.1ST
+++ b/SabreTools.Library/README.1ST
@@ -1205,15 +1205,10 @@ Options:
 			  Add a DAT or folder of DATs to the base set to be used for all
 			  operations. Multiple instances of this flag are allowed.
 
-	  -dga, --diff-game		Diff all inputs by game against a set of base DATs
-		  This flag will enable a special type of diffing in which a set of base
-		  DATs are used as a comparison point for each of the input DATs by game.
-		  This allows users to get a slightly different output to cascaded
-		  diffing, which may be more useful in some cases.
-
-		  -bd=, --base-dat=		   Add a base DAT for processing
-			  Add a DAT or folder of DATs to the base set to be used for all
-			  operations. Multiple instances of this flag are allowed.
+		  -bg, --by-game		   Diff against by game instead of hashes
+			  By default, diffing against uses hashes to determine similar files.
+			  This flag enables using using each game as a comparision point
+			  instead.
 
 	  -br, --base-replace		 Replace from base DATs in order
 		  By default, no item names are changed except when there is a merge
diff --git a/SabreTools/Features/BaseFeature.cs b/SabreTools/Features/BaseFeature.cs
index d1808f07..b251432f 100644
--- a/SabreTools/Features/BaseFeature.cs
+++ b/SabreTools/Features/BaseFeature.cs
@@ -98,6 +98,20 @@ namespace SabreTools.Features
             }
         }
 
+        internal const string ByGameValue = "by-game";
+        internal static Feature ByGameFlag
+        {
+            get
+            {
+                return new Feature(
+                    BaseReplaceValue,
+                    new List<string>() { "-bg", "--by-game" },
+                    "Diff against by game instead of hashes",
+                    FeatureType.Flag,
+                    longDescription: "By default, diffing against uses hashes to determine similar files. This flag enables using using each game as a comparision point instead.");
+            }
+        }
+
         internal const string ChdsAsFilesValue = "chds-as-files";
         internal static Feature ChdsAsFilesFlag
         {
@@ -336,20 +350,6 @@ namespace SabreTools.Features
             }
         }
 
-        internal const string DiffGameValue = "diff-game";
-        internal static Feature DiffGameFlag
-        {
-            get
-            {
-                return new Feature(
-                    DiffAgainstValue,
-                    new List<string>() { "-dga", "--diff-game" },
-                    "Diff all inputs by game against a set of base DATs",
-                    FeatureType.Flag,
-                    "This flag will enable a special type of diffing in which a set of base DATs are used as a comparison point for each of the input DATs by game. This allows users to get a slightly different output to cascaded diffing, which may be more useful in some cases.");
-            }
-        }
-
         internal const string DiffIndividualsValue = "diff-individuals";
         internal static Feature DiffIndividualsFlag
         {
@@ -2503,9 +2503,6 @@ Some special strings that can be used:
             if (GetBoolean(features, DiffDuplicatesValue))
                 updateMode |= UpdateMode.DiffDupesOnly;
 
-            if (GetBoolean(features, DiffGameValue))
-                updateMode |= UpdateMode.DiffGame;
-
             if (GetBoolean(features, DiffIndividualsValue))
                 updateMode |= UpdateMode.DiffIndividualsOnly;
 
diff --git a/SabreTools/Features/Update.cs b/SabreTools/Features/Update.cs
index e63234f1..1589539f 100644
--- a/SabreTools/Features/Update.cs
+++ b/SabreTools/Features/Update.cs
@@ -56,8 +56,7 @@ namespace SabreTools.Features
             this[DiffNoDuplicatesFlag].AddFeature(NoAutomaticDateFlag);
             AddFeature(DiffAgainstFlag);
             this[DiffAgainstFlag].AddFeature(BaseDatListInput);
-            AddFeature(DiffGameFlag);
-            this[DiffGameFlag].AddFeature(BaseDatListInput);
+            this[DiffAgainstFlag].AddFeature(ByGameFlag);
             AddFeature(BaseReplaceFlag);
             this[BaseReplaceFlag].AddFeature(BaseDatListInput);
             this[BaseReplaceFlag].AddFeature(UpdateFieldListInput);
@@ -155,7 +154,8 @@ namespace SabreTools.Features
                 GetBoolean(features, SkipFirstOutputValue),
                 Filter,
                 updateFields,
-                GetBoolean(features, OnlySameValue));
+                GetBoolean(features, OnlySameValue),
+                GetBoolean(Features, ByGameValue));
         }
     }
 }