diff --git a/SabreTools.Helper/Data/Build.cs b/SabreTools.Helper/Data/Build.cs
index c9fc78b5..68b6fd07 100644
--- a/SabreTools.Helper/Data/Build.cs
+++ b/SabreTools.Helper/Data/Build.cs
@@ -198,6 +198,7 @@ namespace SabreTools.Helper
 					helptext.Add("	  -q, --quotes			Put double-quotes around each item");
 					helptext.Add("	  -ae=, --add-ext=		Add an extension to each item");
 					helptext.Add("	  -re=, --rep-ext=		Replace all extensions with specified");
+					helptext.Add("	  -rme, --rem-ext		Remove all extensions from each item");
 					helptext.Add("	  -ro, --romba			Output in Romba format (requires SHA-1)");
 					helptext.Add("	  -tsv, --tsv			Output in Tab-Separated Value format");
 					helptext.Add("	  -csv, --csv			Output in Comma-Separated Value format");
diff --git a/SabreTools.Helper/Data/Structs.cs b/SabreTools.Helper/Data/Structs.cs
index 7a0e25a0..75ba7b2b 100644
--- a/SabreTools.Helper/Data/Structs.cs
+++ b/SabreTools.Helper/Data/Structs.cs
@@ -329,6 +329,7 @@ namespace SabreTools.Helper
 		public bool Quotes;
 		public string RepExt;
 		public string AddExt;
+		public bool RemExt;
 		public bool GameName;
 		public bool Romba;
 		public bool? XSV; // true for tab-deliminated output, false for comma-deliminated output
diff --git a/SabreTools.Helper/README.1ST b/SabreTools.Helper/README.1ST
index 8c5deaf6..d5870bbf 100644
--- a/SabreTools.Helper/README.1ST
+++ b/SabreTools.Helper/README.1ST
@@ -496,6 +496,14 @@ Options:
 				
 			-post=, --postfix=		Set postfix for all lines
 				Set a generic postfix to be appended to all outputted lines
+				
+				Both prefix and postfix can use one of the following special strings:
+					- %game% - Replaced with the Game/Machine name
+					- %name% - Replaced with the Rom name
+					- %crc% - Replaced with the CRC
+					- %md5% - Replaced with the MD5
+					- %sha1% - Replaced with the SHA-1
+					- %size% - Replaced with the size
 			
 			-q, --quotes			Put double-quotes around each item
 				This quotes only the item and not the prefix and postfix
@@ -505,6 +513,9 @@ Options:
 			
 			-re=, --rep-ext=		Replace all extensions with specified
 				When an extension exists, replace it with the provided instead
+				
+			-rme, --rem-ext			Remove all extensions from all items
+				For each item, the extension is removed
 			
 			-ro, --romba			Output in Romba format (requires SHA-1)
 				Instead of outputting the game or rom name, output the SHA-1 of the files
diff --git a/SabreTools.Helper/Tools/DatTools.cs b/SabreTools.Helper/Tools/DatTools.cs
index 22c216a6..de433d67 100644
--- a/SabreTools.Helper/Tools/DatTools.cs
+++ b/SabreTools.Helper/Tools/DatTools.cs
@@ -2496,9 +2496,9 @@ namespace SabreTools.Helper
 
 				// Create a dictionary of all ROMs from the input DATs
 				Dat userData;
-				List<Dat> datHeaders = PopulateUserData(newInputFileNames, inplace, clean, softlist,
+				List<Dat> datHeaders = PopulateUserDataParallel(newInputFileNames, inplace, clean, softlist,
 					outputDirectory, datdata, out userData, gamename, romname, romtype, sgt, slt, seq,
-					crc, md5, sha1, nodump, trim, single, root, logger);
+					crc, md5, sha1, nodump, trim, single, root, maxDegreeOfParallelism, logger);
 
 				// Modify the Dictionary if necessary and output the results
 				if (diff != 0 && cascade == null)
@@ -3129,8 +3129,20 @@ namespace SabreTools.Helper
 						string post = (datdata.Quotes ? "\"" : "") + datdata.Postfix;
 
 						// Check for special strings in prefix and postfix
-						pre = pre.Replace("%crc%", rom.HashData.CRC).Replace("%md5%", rom.HashData.MD5).Replace("%sha1%", rom.HashData.SHA1).Replace("%size%", rom.HashData.Size.ToString());
-						post = post.Replace("%crc%", rom.HashData.CRC).Replace("%md5%", rom.HashData.MD5).Replace("%sha1%", rom.HashData.SHA1).Replace("%size%", rom.HashData.Size.ToString());
+						pre = pre
+							.Replace("%game%", rom.Machine.Name)
+							.Replace("%name%", rom.Name)
+							.Replace("%crc%", rom.HashData.CRC)
+							.Replace("%md5%", rom.HashData.MD5)
+							.Replace("%sha1%", rom.HashData.SHA1)
+							.Replace("%size%", rom.HashData.Size.ToString());
+						post = post
+							.Replace("%game%", rom.Machine.Name)
+							.Replace("%name%", rom.Name)
+							.Replace("%crc%", rom.HashData.CRC)
+							.Replace("%md5%", rom.HashData.MD5)
+							.Replace("%sha1%", rom.HashData.SHA1)
+							.Replace("%size%", rom.HashData.Size.ToString());
 
 						// If we're in Romba mode, the state is consistent
 						if (datdata.Romba)
@@ -3163,8 +3175,13 @@ namespace SabreTools.Helper
 						else
 						{
 							string name = (datdata.UseGame ? rom.Machine.Name : rom.Name);
-							if (datdata.RepExt != "")
+							if (datdata.RepExt != "" || datdata.RemExt)
 							{
+								if (datdata.RemExt)
+								{
+									datdata.RepExt = "";
+								}
+
 								string dir = Path.GetDirectoryName(name);
 								dir = (dir.StartsWith(Path.DirectorySeparatorChar.ToString()) ? dir.Remove(0, 1) : dir);
 								name = Path.Combine(dir, Path.GetFileNameWithoutExtension(name) + datdata.RepExt);
diff --git a/SabreTools/Partials/SabreTools_Inits.cs b/SabreTools/Partials/SabreTools_Inits.cs
index f13e40c4..420dd4f1 100644
--- a/SabreTools/Partials/SabreTools_Inits.cs
+++ b/SabreTools/Partials/SabreTools_Inits.cs
@@ -101,6 +101,7 @@ namespace SabreTools
 		/// <param name="quotes">Add quotes to each item</param>
 		/// <param name="repext">Replace all extensions with another</param>
 		/// <param name="addext">Add an extension to all items</param>
+		/// <param name="remext">Remove all extensions</param>
 		/// <param name="datprefix">Add the dat name as a directory prefix</param>
 		/// <param name="romba">Output files in romba format</param>
 		/// <param name="tsv">True to output files in TSV format, false to output files in CSV format, null otherwise</param>
@@ -161,6 +162,7 @@ namespace SabreTools
 			bool quotes,
 			string repext,
 			string addext,
+			bool remext,
 			bool datprefix,
 			bool romba,
 			bool? tsv,
@@ -311,6 +313,7 @@ namespace SabreTools
 				Quotes = quotes,
 				RepExt = repext,
 				AddExt = addext,
+				RemExt = remext,
 				GameName = datprefix,
 				Romba = romba,
 				XSV = tsv,
diff --git a/SabreTools/SabreTools.cs b/SabreTools/SabreTools.cs
index dde6a9a2..9004a9a7 100644
--- a/SabreTools/SabreTools.cs
+++ b/SabreTools/SabreTools.cs
@@ -105,6 +105,7 @@ namespace SabreTools
 				old = false,
 				quotes = false,
 				rem = false,
+				remext = false,
 				romba = false,
 				single = false,
 				softlist = false,
@@ -367,6 +368,10 @@ namespace SabreTools
 					case "--remove":
 						rem = true;
 						break;
+					case "-rme":
+					case "--rem-ext":
+						remext = true;
+						break;
 					case "-ro":
 					case "--romba":
 						romba = true;
@@ -670,7 +675,7 @@ namespace SabreTools
 			{
 				InitUpdate(inputs, filename, name, description, rootdir, category, version, date, author, email, homepage, url, comment, header,
 					superdat, forcemerge, forcend, forcepack, outputFormat, usegame, prefix,
-					postfix, quotes, repext, addext, datprefix, romba, tsv, merge, diffMode, cascade, inplace, skip, bare, gamename, romname,
+					postfix, quotes, repext, addext, remext, datprefix, romba, tsv, merge, diffMode, cascade, inplace, skip, bare, gamename, romname,
 					romtype, sgt, slt, seq, crc, md5, sha1, nodump, trim, single, root, outdir, clean, softlist, dedup, maxParallelism);
 			}