diff --git a/DATabase/MergeDiff.cs b/DATabase/MergeDiff.cs
index 30cf5d50..b0514932 100644
--- a/DATabase/MergeDiff.cs
+++ b/DATabase/MergeDiff.cs
@@ -82,7 +82,6 @@ namespace SabreTools
 			}
 
 			List<RomData> A = new List<RomData>();
-			List<RomData> X = new List<RomData>();
 
 			foreach (string input in _inputs)
 			{
@@ -96,56 +95,6 @@ namespace SabreTools
 				{
 					A.AddRange(B);
 				}
-
-				// If we're in all-diff mode, get a master merged DAT to compare against
-				if (_ad)
-				{
-					X.AddRange(B);
-				}
-			}
-
-			// If we're in all diff mode, diff against every DAT and output accordingly
-			if (_ad)
-			{
-				foreach (string input in _inputs)
-				{
-					List<RomData> B = RomManipulation.Parse(input, 0, 0, _logger);
-					List<RomData> C = RomManipulation.DiffOnlyInA(B, X);
-					List<RomData> D = RomManipulation.DiffInAB(B, X);
-
-					if (_dedup)
-					{
-						C = RomManipulation.Merge(C);
-						D = RomManipulation.Merge(D);
-					}
-
-					if (_name == "")
-					{
-						_name = (_diff ? "diffdat" : "mergedat") + (_dedup ? "-merged" : "");
-					}
-					if (_desc == "")
-					{
-						_desc = (_diff ? "diffdat" : "mergedat") + (_dedup ? "-merged" : "");
-						if (!_bare)
-						{
-							_desc += " (" + _date + ")";
-						}
-					}
-					if (_cat == "" && _diff)
-					{
-						_cat = "DiffDAT";
-					}
-					if (_author == "")
-					{
-						_author = "SabreTools";
-					}
-
-					string realname = Path.GetFileNameWithoutExtension(input);
-
-					// Now write the files out
-					Output.WriteToDat(_name + "-" + realname + "-inall", _desc + "-" + realname + "-inall", _version, _date, _cat, _author, _forceunpack, _old, "", C, _logger);
-					Output.WriteToDat(_name + "-" + realname + "-only", _desc + "-" + realname + "-only", _version, _date, _cat, _author, _forceunpack, _old, "", D, _logger);
-				}
 			}
 
 			// If we want a merged list, send it for merging before outputting