diff --git a/RombaSharp/Partials/RombaSharp.Helpers.cs b/RombaSharp/Partials/RombaSharp.Helpers.cs
index b44309ee..759a2aee 100644
--- a/RombaSharp/Partials/RombaSharp.Helpers.cs
+++ b/RombaSharp/Partials/RombaSharp.Helpers.cs
@@ -404,7 +404,7 @@ namespace RombaSharp
 			DatFile datroot = new DatFile { Type = "SuperDAT", };
 			// TODO: All instances of Hash.DeepHashes should be made into 0x0 eventually
 			datroot.PopulateFromDir(_dats, Hash.DeepHashes, false, false, false, SkipFileType.None, false, false, _tmpdir, false, null);
-			datroot.BucketBy(SortedBy.SHA1, false /* mergeroms */);
+			datroot.BucketBy(SortedBy.SHA1, DedupeType.None);
 
 			// Create a List of dat hashes in the database (SHA-1)
 			List<string> databaseDats = new List<string>();
@@ -434,7 +434,7 @@ namespace RombaSharp
 					unneeded.Add(hash);
 				}
 			}
-			datroot.BucketBy(SortedBy.Game, false /* mergeroms */, norename: true);
+			datroot.BucketBy(SortedBy.Game, DedupeType.None, norename: true);
 
 			Globals.Logger.User("Populating complete in {0}", DateTime.Now.Subtract(start).ToString(@"hh\:mm\:ss\.fffff"));
 
@@ -619,7 +619,7 @@ namespace RombaSharp
 			DatFile depot = new DatFile();
 			// TODO: All instances of Hash.DeepHashes should be made into 0x0 eventually
 			depot.PopulateFromDir(depotname, Hash.DeepHashes, false, false, true, SkipFileType.None, false, false, _tmpdir, false, null);
-			depot.BucketBy(SortedBy.SHA1, false /* mergeroms */);
+			depot.BucketBy(SortedBy.SHA1, DedupeType.None);
 
 			// Set the base queries to use
 			string crcquery = "INSERT OR IGNORE INTO crc (crc) VALUES";
diff --git a/SabreTools.Library/Data/Enums.cs b/SabreTools.Library/Data/Enums.cs
index 36393ac7..fc013fed 100644
--- a/SabreTools.Library/Data/Enums.cs
+++ b/SabreTools.Library/Data/Enums.cs
@@ -210,6 +210,16 @@
 
 	#region DatFile related
 
+	/// <summary>
+	/// Determines the DAT deduplication type
+	/// </summary>
+	public enum DedupeType
+	{
+		None = 0,
+		Full,
+		Game
+	}
+
 	/// <summary>
 	/// Determines forcemerging tag for DAT output
 	/// </summary>
diff --git a/SabreTools.Library/Dats/DatFile.cs b/SabreTools.Library/Dats/DatFile.cs
index 34d810a6..e04da511 100644
--- a/SabreTools.Library/Dats/DatFile.cs
+++ b/SabreTools.Library/Dats/DatFile.cs
@@ -29,7 +29,7 @@ namespace SabreTools.Library.Dats
 		private ForcePacking _forcePacking;
 		private DatFormat _datFormat;
 		private bool _excludeOf;
-		private bool _mergeRoms;
+		private DedupeType _dedupeRoms;
 		private Hash _stripHash;
 		private bool _oneGameOneRegion;
 		private List<string> _regions = new List<string>();
@@ -162,10 +162,10 @@ namespace SabreTools.Library.Dats
 			get { return _excludeOf; }
 			set { _excludeOf = value; }
 		}
-		public bool MergeRoms
+		public DedupeType DedupeRoms
 		{
-			get { return _mergeRoms; }
-			set { _mergeRoms = value; }
+			get { return _dedupeRoms; }
+			set { _dedupeRoms = value; }
 		}
 		public Hash StripHash
 		{
@@ -548,7 +548,7 @@ namespace SabreTools.Library.Dats
 			_forcePacking = datFile.ForcePacking;
 			_excludeOf = datFile.ExcludeOf;
 			_datFormat = datFile.DatFormat;
-			_mergeRoms = datFile.MergeRoms;
+			_dedupeRoms = datFile.DedupeRoms;
 			_stripHash = datFile.StripHash;
 			_sortedBy = SortedBy.Default;
 			_useGame = datFile.UseGame;
diff --git a/SabreTools.Library/Dats/DatItem.cs b/SabreTools.Library/Dats/DatItem.cs
index 9294821f..60b6d551 100644
--- a/SabreTools.Library/Dats/DatItem.cs
+++ b/SabreTools.Library/Dats/DatItem.cs
@@ -351,7 +351,7 @@ namespace SabreTools.Library.Dats
 					&& ((_itemType == ItemType.Rom && !String.IsNullOrEmpty(((Rom)this).SHA512))
 						|| (_itemType == ItemType.Disk && !String.IsNullOrEmpty(((Disk)this).SHA512))))
 				{
-					datdata.BucketBy(SortedBy.SHA512, false /* mergeroms */);
+					datdata.BucketBy(SortedBy.SHA512, DedupeType.None);
 				}
 
 				// If all items are supposed to have a SHA-384, we sort by that
@@ -359,7 +359,7 @@ namespace SabreTools.Library.Dats
 					&& ((_itemType == ItemType.Rom && !String.IsNullOrEmpty(((Rom)this).SHA384))
 						|| (_itemType == ItemType.Disk && !String.IsNullOrEmpty(((Disk)this).SHA384))))
 				{
-					datdata.BucketBy(SortedBy.SHA384, false /* mergeroms */);
+					datdata.BucketBy(SortedBy.SHA384, DedupeType.None);
 				}
 
 				// If all items are supposed to have a SHA-256, we sort by that
@@ -370,12 +370,12 @@ namespace SabreTools.Library.Dats
 					if (_itemType == ItemType.Rom)
 					{
 						key = ((Rom)this).SHA256;
-						datdata.BucketBy(SortedBy.SHA256, false /* mergeroms */);
+						datdata.BucketBy(SortedBy.SHA256, DedupeType.None);
 					}
 					else
 					{
 						key = ((Disk)this).SHA256;
-						datdata.BucketBy(SortedBy.SHA256, false /* mergeroms */);
+						datdata.BucketBy(SortedBy.SHA256, DedupeType.None);
 					}
 				}
 
@@ -387,12 +387,12 @@ namespace SabreTools.Library.Dats
 					if (_itemType == ItemType.Rom)
 					{
 						key = ((Rom)this).SHA1;
-						datdata.BucketBy(SortedBy.SHA1, false /* mergeroms */);
+						datdata.BucketBy(SortedBy.SHA1, DedupeType.None);
 					}
 					else
 					{
 						key = ((Disk)this).SHA1;
-						datdata.BucketBy(SortedBy.SHA1, false /* mergeroms */);
+						datdata.BucketBy(SortedBy.SHA1, DedupeType.None);
 					}
 				}
 
@@ -404,12 +404,12 @@ namespace SabreTools.Library.Dats
 					if (_itemType == ItemType.Rom)
 					{
 						key = ((Rom)this).MD5;
-						datdata.BucketBy(SortedBy.MD5, false /* mergeroms */);
+						datdata.BucketBy(SortedBy.MD5, DedupeType.None);
 					}
 					else
 					{
 						key = ((Disk)this).MD5;
-						datdata.BucketBy(SortedBy.MD5, false /* mergeroms */);
+						datdata.BucketBy(SortedBy.MD5, DedupeType.None);
 					}
 				}
 			}			
@@ -491,21 +491,21 @@ namespace SabreTools.Library.Dats
 				if (_itemType == ItemType.Disk)
 				{
 					key = ((Disk)this).MD5;
-					datdata.BucketBy(SortedBy.MD5, false /* mergeroms */);
+					datdata.BucketBy(SortedBy.MD5, DedupeType.None);
 				}
 
 				// If we've gotten here and we have a Rom, sort by CRC
 				else if (_itemType == ItemType.Rom)
 				{
 					key = ((Rom)this).CRC;
-					datdata.BucketBy(SortedBy.CRC, false /* mergeroms */);
+					datdata.BucketBy(SortedBy.CRC, DedupeType.None);
 				}
 
 				// Otherwise, we use -1 as the key
 				else
 				{
 					key = "-1";
-					datdata.BucketBy(SortedBy.Size, false /* mergeroms */);
+					datdata.BucketBy(SortedBy.Size, DedupeType.None);
 				}
 			}
 
diff --git a/SabreTools.Library/Dats/Partials/DatFile.ConvertUpdate.cs b/SabreTools.Library/Dats/Partials/DatFile.ConvertUpdate.cs
index bfe75e24..73e830a5 100644
--- a/SabreTools.Library/Dats/Partials/DatFile.ConvertUpdate.cs
+++ b/SabreTools.Library/Dats/Partials/DatFile.ConvertUpdate.cs
@@ -119,7 +119,7 @@ namespace SabreTools.Library.Dats
 				datHeaders[i] = new DatFile
 				{
 					DatFormat = (DatFormat != 0 ? DatFormat : 0),
-					MergeRoms = MergeRoms,
+					DedupeRoms = DedupeRoms,
 				};
 
 				datHeaders[i].Parse(input.Split('¬')[0], i, 0, splitType, keep: true, clean: clean, remUnicode: remUnicode, descAsName: descAsName);
@@ -187,7 +187,7 @@ namespace SabreTools.Library.Dats
 			Globals.Logger.User("Populating base DAT complete in {0}", DateTime.Now.Subtract(start).ToString(@"hh\:mm\:ss\.fffff"));
 
 			// For comparison's sake, we want to use CRC as the base ordering
-			BucketBy(SortedBy.CRC, true);
+			BucketBy(SortedBy.CRC, DedupeType.Full);
 
 			// Now we want to compare each input DAT against the base
 			List<string> inputFileNames = FileTools.GetOnlyFilesFromInputs(inputPaths, appendparent: true);
@@ -203,7 +203,7 @@ namespace SabreTools.Library.Dats
 				intDat.Parse(splitpath[0], 1, 1, keep: true, clean: clean, remUnicode: remUnicode, descAsName: descAsName);
 
 				// For comparison's sake, we want to use CRC as the base ordering
-				intDat.BucketBy(SortedBy.CRC, true);
+				intDat.BucketBy(SortedBy.CRC, DedupeType.Full);
 
 				// Then we do a hashwise comparison against the base DAT
 				List<string> keys = intDat.Keys.ToList();
diff --git a/SabreTools.Library/Dats/Partials/DatFile.Manipulate.cs b/SabreTools.Library/Dats/Partials/DatFile.Manipulate.cs
index 8bf19c6c..ccb1b2e1 100644
--- a/SabreTools.Library/Dats/Partials/DatFile.Manipulate.cs
+++ b/SabreTools.Library/Dats/Partials/DatFile.Manipulate.cs
@@ -25,10 +25,10 @@ namespace SabreTools.Library.Dats
 		/// Take the arbitrarily sorted Files Dictionary and convert to one sorted by a user-defined method
 		/// </summary>
 		/// <param name="bucketBy">SortedBy enum representing how to sort the individual items</param>
-		/// <param name="mergeroms">True if roms should be deduped, false otherwise</param>
+		/// <param name="deduperoms">Dedupe type that should be used</param>
 		/// <param name="lower">True if the key should be lowercased (default), false otherwise</param>
 		/// <param name="norename">True if games should only be compared on game and file name, false if system and source are counted</param>
-		public void BucketBy(SortedBy bucketBy, bool mergeroms, bool lower = true, bool norename = true)
+		public void BucketBy(SortedBy bucketBy, DedupeType deduperoms, bool lower = true, bool norename = true)
 		{
 			// If we already have the right sorting, trust it
 			if (_sortedBy == bucketBy)
@@ -48,7 +48,7 @@ namespace SabreTools.Library.Dats
 			// Create the temporary dictionary to sort into
 			SortedDictionary<string, List<DatItem>> sortable = new SortedDictionary<string, List<DatItem>>();
 
-			Globals.Logger.User("Organizing roms by {0}" + (mergeroms ? " and merging" : ""), bucketBy);
+			Globals.Logger.User("Organizing roms by {0}" + (deduperoms != DedupeType.None ? " and merging" : ""), bucketBy);
 
 			// First do the initial sort of all of the roms
 			List<string> keys = Keys.ToList();
@@ -152,7 +152,7 @@ namespace SabreTools.Library.Dats
 				DatItem.Sort(ref sortedlist, false);
 
 				// If we're merging the roms, do so
-				if (mergeroms)
+				if (deduperoms == DedupeType.Full || (deduperoms == DedupeType.Game && bucketBy == SortedBy.Game))
 				{
 					sortedlist = DatItem.Merge(sortedlist);
 				}
@@ -384,8 +384,8 @@ namespace SabreTools.Library.Dats
 		/// <summary>
 		/// Use cdevice_ref tags to get full non-merged sets and remove parenting tags
 		/// </summary>
-		/// <param name="mergeroms">True if roms should be deduped, false otherwise</param>
-		public void CreateDeviceNonMergedSets(bool mergeroms)
+		/// <param name="mergeroms">Dedupe type to be used</param>
+		public void CreateDeviceNonMergedSets(DedupeType mergeroms)
 		{
 			Globals.Logger.User("Creating device non-merged sets from the DAT");
 
@@ -406,8 +406,8 @@ namespace SabreTools.Library.Dats
 		/// <summary>
 		/// Use cloneof tags to create non-merged sets and remove the tags plus using the device_ref tags to get full sets
 		/// </summary>
-		/// <param name="mergeroms">True if roms should be deduped, false otherwise</param>
-		public void CreateFullyNonMergedSets(bool mergeroms)
+		/// <param name="mergeroms">Dedupe type to be used</param>
+		public void CreateFullyNonMergedSets(DedupeType mergeroms)
 		{
 			Globals.Logger.User("Creating fully non-merged sets from the DAT");
 
@@ -432,8 +432,8 @@ namespace SabreTools.Library.Dats
 		/// <summary>
 		/// Use cloneof tags to create merged sets and remove the tags
 		/// </summary>
-		/// <param name="mergeroms">True if roms should be deduped, false otherwise</param>
-		public void CreateMergedSets(bool mergeroms)
+		/// <param name="mergeroms">Dedupe type to be used</param>
+		public void CreateMergedSets(DedupeType mergeroms)
 		{
 			Globals.Logger.User("Creating merged sets from the DAT");
 
@@ -454,8 +454,8 @@ namespace SabreTools.Library.Dats
 		/// <summary>
 		/// Use cloneof tags to create non-merged sets and remove the tags
 		/// </summary>
-		/// <param name="mergeroms">True if roms should be deduped, false otherwise</param>
-		public void CreateNonMergedSets(bool mergeroms)
+		/// <param name="mergeroms">Dedupe type to be used</param>
+		public void CreateNonMergedSets(DedupeType mergeroms)
 		{
 			Globals.Logger.User("Creating non-merged sets from the DAT");
 
@@ -476,8 +476,8 @@ namespace SabreTools.Library.Dats
 		/// <summary>
 		/// Use cloneof and romof tags to create split sets and remove the tags
 		/// </summary>
-		/// <param name="mergeroms">True if roms should be deduped, false otherwise</param>
-		public void CreateSplitSets(bool mergeroms)
+		/// <param name="mergeroms">Dedupe type to be used</param>
+		public void CreateSplitSets(DedupeType mergeroms)
 		{
 			Globals.Logger.User("Creating split sets from the DAT");
 
diff --git a/SabreTools.Library/Dats/Partials/DatFile.Rebuild.cs b/SabreTools.Library/Dats/Partials/DatFile.Rebuild.cs
index 209c4ab0..fdb28dae 100644
--- a/SabreTools.Library/Dats/Partials/DatFile.Rebuild.cs
+++ b/SabreTools.Library/Dats/Partials/DatFile.Rebuild.cs
@@ -148,7 +148,7 @@ namespace SabreTools.Library.Dats
 			}
 
 			// Now that we have a list of depots, we want to sort the input DAT by SHA-1
-			BucketBy(SortedBy.SHA1, false /* mergeroms */);
+			BucketBy(SortedBy.SHA1, DedupeType.None);
 
 			// Then we want to loop through each of the hashes and see if we can rebuild
 			List<string> hashes = Keys.ToList();
@@ -884,7 +884,7 @@ namespace SabreTools.Library.Dats
 			}
 
 			// Now that we have a list of depots, we want to sort the input DAT by SHA-1
-			BucketBy(SortedBy.SHA1, false /* mergeroms */);
+			BucketBy(SortedBy.SHA1, DedupeType.None);
 
 			// Then we want to loop through each of the hashes and see if we can rebuild
 			List<string> hashes = Keys.ToList();
@@ -994,7 +994,7 @@ namespace SabreTools.Library.Dats
 			if (hashOnly)
 			{
 				// First we need to sort by hash to get duplicates
-				BucketBy(SortedBy.SHA1, false /* mergeroms */);
+				BucketBy(SortedBy.SHA1, DedupeType.None);
 
 				// Then follow the same tactics as before
 				foreach (string key in Keys)
diff --git a/SabreTools.Library/Dats/Partials/DatFile.Splitters.cs b/SabreTools.Library/Dats/Partials/DatFile.Splitters.cs
index 43e11079..e5b30504 100644
--- a/SabreTools.Library/Dats/Partials/DatFile.Splitters.cs
+++ b/SabreTools.Library/Dats/Partials/DatFile.Splitters.cs
@@ -155,7 +155,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile sha512 = new DatFile
 			{
@@ -176,7 +176,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile sha384 = new DatFile
 			{
@@ -197,7 +197,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile sha256 = new DatFile
 			{
@@ -218,7 +218,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile sha1 = new DatFile
 			{
@@ -239,7 +239,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile md5 = new DatFile
 			{
@@ -260,7 +260,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile crc = new DatFile
 			{
@@ -281,7 +281,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile other = new DatFile
 			{
@@ -302,7 +302,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 
 			// Now populate each of the DAT objects in turn
@@ -405,7 +405,7 @@ namespace SabreTools.Library.Dats
 			basepath = (basepath.EndsWith(Path.DirectorySeparatorChar.ToString()) ? basepath : basepath + Path.DirectorySeparatorChar);
 
 			// First, organize by games so that we can do the right thing
-			BucketBy(SortedBy.Game, false /* mergeroms */, lower: false, norename: true);
+			BucketBy(SortedBy.Game, DedupeType.None, lower: false, norename: true);
 
 			// Create a temporary DAT to add things to
 			DatFile tempDat = new DatFile(this)
@@ -537,7 +537,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile diskdat = new DatFile
 			{
@@ -558,7 +558,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 			DatFile sampledat = new DatFile
 			{
@@ -579,7 +579,7 @@ namespace SabreTools.Library.Dats
 				ForceNodump = this.ForceNodump,
 				ForcePacking = this.ForcePacking,
 				DatFormat = this.DatFormat,
-				MergeRoms = this.MergeRoms,
+				DedupeRoms = this.DedupeRoms,
 			};
 
 			// Now populate each of the DAT objects in turn
diff --git a/SabreTools.Library/Dats/Partials/DatFile.Statistics.cs b/SabreTools.Library/Dats/Partials/DatFile.Statistics.cs
index c312a1ca..30732a06 100644
--- a/SabreTools.Library/Dats/Partials/DatFile.Statistics.cs
+++ b/SabreTools.Library/Dats/Partials/DatFile.Statistics.cs
@@ -205,7 +205,7 @@ namespace SabreTools.Library.Dats
 				RecalculateStats();
 			}
 
-			BucketBy(SortedBy.Game, false /* mergeroms */, norename: true);
+			BucketBy(SortedBy.Game, DedupeType.None, norename: true);
 			if (_totalSize < 0)
 			{
 				_totalSize = Int64.MaxValue + _totalSize;
@@ -502,7 +502,7 @@ namespace SabreTools.Library.Dats
 				List<string> games = new List<string>();
 				DatFile datdata = new DatFile();
 				datdata.Parse(filename.Item1, 0, 0);
-				datdata.BucketBy(SortedBy.Game, false /* mergeroms */, norename: true);
+				datdata.BucketBy(SortedBy.Game, DedupeType.None, norename: true);
 
 				// Output single DAT stats (if asked)
 				Globals.Logger.User("Adding stats for file '{0}'\n", false, filename.Item1);
diff --git a/SabreTools.Library/Dats/Partials/DatFile.Writers.cs b/SabreTools.Library/Dats/Partials/DatFile.Writers.cs
index 48eba906..79da4d98 100644
--- a/SabreTools.Library/Dats/Partials/DatFile.Writers.cs
+++ b/SabreTools.Library/Dats/Partials/DatFile.Writers.cs
@@ -105,14 +105,18 @@ namespace SabreTools.Library.Dats
 					recalculate: (RomCount + DiskCount == 0), baddumpCol: true, nodumpCol: true);
 			}
 
-			// First bucket by CRC to dedupe if required
-			if (MergeRoms)
+			// Bucket and dedupe according to the flag
+			if (DedupeRoms == DedupeType.Full)
 			{
-				BucketBy(SortedBy.CRC, MergeRoms, norename: norename);
+				BucketBy(SortedBy.CRC, DedupeRoms, norename: norename);
+			}
+			else if (DedupeRoms == DedupeType.Game)
+			{
+				BucketBy(SortedBy.Game, DedupeRoms, norename: norename);
 			}
 
-			// Bucket roms by game name
-			BucketBy(SortedBy.Game, false /* mergeRoms */, norename: norename);
+			// Bucket roms by game name, if not already
+			BucketBy(SortedBy.Game, DedupeType.None, norename: norename);
 
 			// Output the number of items we're going to be writing
 			Globals.Logger.User("A total of {0} items will be written out to '{1}'", Count, FileName);
diff --git a/SabreTools.Library/README.1ST b/SabreTools.Library/README.1ST
index 5a894267..8ac69a81 100644
--- a/SabreTools.Library/README.1ST
+++ b/SabreTools.Library/README.1ST
@@ -1102,6 +1102,11 @@ Options:
 			For all outputted DATs, allow for hash deduping. This makes sure
 			that there are effectively no duplicates in the output files.
 			
+		-gdd, --game-dedup	Enable deduping within games in the created DAT
+			For all outputted DATs, allow for hash deduping but only within the
+			games, and not across the entire DAT. This makes sure that there
+			are effectively no duplicates within each of the output sets.
+			
 		-m, --merge		Merge the input DATs
 			By default, all DATs are processed individually with the user-
 			specified flags. With this flag enabled, all of the input DATs are
diff --git a/SabreTools/Partials/SabreTools.Help.cs b/SabreTools/Partials/SabreTools.Help.cs
index a9525ba8..6e98372b 100644
--- a/SabreTools/Partials/SabreTools.Help.cs
+++ b/SabreTools/Partials/SabreTools.Help.cs
@@ -1130,6 +1130,11 @@ namespace SabreTools
 				"Enable deduping in the created DAT",
 				FeatureType.Flag,
 				null));
+			update.AddFeature("game-dedup", new Feature(
+				new List<string>() { "-gdd", "--game-dedup" },
+				"Enable in-game deduping in the created DAT",
+				FeatureType.Flag,
+				null));
 			update.AddFeature("merge", new Feature(
 				new List<string>() { "-m", "--merge" },
 				"Merge the input DATs",
diff --git a/SabreTools/Partials/SabreTools.Inits.cs b/SabreTools/Partials/SabreTools.Inits.cs
index 31f75cfb..e625beaf 100644
--- a/SabreTools/Partials/SabreTools.Inits.cs
+++ b/SabreTools/Partials/SabreTools.Inits.cs
@@ -497,7 +497,7 @@ namespace SabreTools
 		/// <param name="clean">True to clean the game names to WoD standard, false otherwise (default)</param>
 		/// <param name="remUnicode">True if we should remove non-ASCII characters from output, false otherwise (default)</param>
 		/// <param name="descAsName">True if descriptions should be used as names, false otherwise (default)</param>
-		/// <param name="dedup">True to dedupe the roms in the DAT, false otherwise (default)</param>
+		/// <param name="dedup">Dedupe type to use for DAT processing</param>
 		/// <param name="stripHash">StripHash that represents the hash(es) that you want to remove from the output</param>
 		private static void InitUpdate(
 			List<string> inputPaths,
@@ -558,7 +558,7 @@ namespace SabreTools
 			bool clean,
 			bool remUnicode,
 			bool descAsName,
-			bool dedup,
+			DedupeType dedup,
 			Hash stripHash)
 		{
 			// Set the special flags
@@ -668,11 +668,11 @@ namespace SabreTools
 				}
 				if (name == "")
 				{
-					name = (diffMode != 0 ? "DiffDAT" : "MergeDAT") + (superdat ? "-SuperDAT" : "") + (dedup ? "-deduped" : "");
+					name = (diffMode != 0 ? "DiffDAT" : "MergeDAT") + (superdat ? "-SuperDAT" : "") + (dedup != DedupeType.None ? "-deduped" : "");
 				}
 				if (description == "")
 				{
-					description = (diffMode != 0 ? "DiffDAT" : "MergeDAT") + (superdat ? "-SuperDAT" : "") + (dedup ? " - deduped" : "");
+					description = (diffMode != 0 ? "DiffDAT" : "MergeDAT") + (superdat ? "-SuperDAT" : "") + (dedup != DedupeType.None ? " - deduped" : "");
 					if (!bare)
 					{
 						description += " (" + date + ")";
@@ -708,7 +708,7 @@ namespace SabreTools
 				ForceMerging = fm,
 				ForceNodump = fn,
 				ForcePacking = fp,
-				MergeRoms = dedup,
+				DedupeRoms = dedup,
 				ExcludeOf = excludeOf,
 				DatFormat = datFormat,
 				StripHash = stripHash,
diff --git a/SabreTools/SabreTools.cs b/SabreTools/SabreTools.cs
index e70a9693..61dca705 100644
--- a/SabreTools/SabreTools.cs
+++ b/SabreTools/SabreTools.cs
@@ -95,7 +95,6 @@ namespace SabreTools
 				cleanGameNames = false,
 				copyFiles = false,
 				datPrefix = false,
-				dedup = false,
 				delete = false,
 				descAsName = false,
 				enableGzip = false,
@@ -122,6 +121,7 @@ namespace SabreTools
 				updateDat = false,
 				usegame = true;
 			DatFormat datFormat = 0x0;
+			DedupeType dedup = DedupeType.None;
 			DiffMode diffMode = 0x0;
 			Hash omitFromScan = Hash.SHA256 | Hash.SHA384 | Hash.SHA512; // Should be set to 0x0 later
 			Hash stripHash = 0x0;
@@ -326,7 +326,7 @@ namespace SabreTools
 						break;
 					case "-dd":
 					case "--dedup":
-						dedup = true;
+						dedup = DedupeType.Full;
 						break;
 					case "-del":
 					case "--delete":
@@ -372,6 +372,10 @@ namespace SabreTools
 					case "--files":
 						parseArchivesAsFiles = true;
 						break;
+					case "-gdd":
+					case "--game-dedup":
+						dedup = DedupeType.Game;
+						break;
 					case "-gp":
 					case "--game-prefix":
 						datPrefix = true;