diff --git a/GamesDat.Demo.Wpf/ViewModels/FileWatcherTabViewModel.cs b/GamesDat.Demo.Wpf/ViewModels/FileWatcherTabViewModel.cs
index c2a7a58..1b0d028 100644
--- a/GamesDat.Demo.Wpf/ViewModels/FileWatcherTabViewModel.cs
+++ b/GamesDat.Demo.Wpf/ViewModels/FileWatcherTabViewModel.cs
@@ -15,6 +15,7 @@
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.IO;
+using GamesDat.Core.Telemetry.Sources.AgeOfEmpires4;
 
 namespace GamesDat.Demo.Wpf.ViewModels;
 
@@ -323,6 +324,33 @@ private void InitializeBuiltInSources()
                 null);
             Sources.Add(brawlhallaSource);
         }
+
+        // Add AoE IV source
+        try
+        {
+            var aoe4Path = AgeOfEmpires4ReplayFileSource.GetDefaultReplayPath();
+            System.Diagnostics.Debug.WriteLine($"AoE IV replay path: {aoe4Path}");
+            var aoe4Source = new FileWatcherSourceViewModel(
+                "Age of Empires IV",
+                aoe4Path,
+                "*.*",
+                () => new AgeOfEmpires4ReplayFileSource());
+            aoe4Source.DetectedFiles.CollectionChanged += OnSourceFilesChanged;
+            Sources.Add(aoe4Source);
+        }
+        catch (DirectoryNotFoundException)
+        {
+            // Game not installed - add disabled source
+            var defaultPath = Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
+                "Age of Empires IV", "playback");
+            var aoe4Source = new FileWatcherSourceViewModel(
+                "Age of Empires IV (Not Installed)",
+                defaultPath,
+                "*.*",
+                null);
+            Sources.Add(aoe4Source);
+        }
     }
 
     private void OnSourceFilesChanged(object? sender, NotifyCollectionChangedEventArgs e)
diff --git a/GamesDat.Tests/Helpers/FileWatcherTestData.cs b/GamesDat.Tests/Helpers/FileWatcherTestData.cs
index 525cfdc..689bc54 100644
--- a/GamesDat.Tests/Helpers/FileWatcherTestData.cs
+++ b/GamesDat.Tests/Helpers/FileWatcherTestData.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using GamesDat.Core.Telemetry.Sources;
+using GamesDat.Core.Telemetry.Sources.AgeOfEmpires4;
 using GamesDat.Core.Telemetry.Sources.Tekken8;
 
 namespace GamesDat.Tests.Helpers;
@@ -12,6 +13,16 @@ namespace GamesDat.Tests.Helpers;
 /// </summary>
 public class FileWatcherTestData
 {
+
+    /// <summary>
+    /// Sources we currently explicitly ignore during testing ebcause they use an
+    /// overly broad pattern ("*.*") and require special handling to avoid test pollution.
+    /// </summary>
+    public static Type[] IgnoredSources = [
+        typeof(Tekken8ReplayFileSource), 
+        typeof(AgeOfEmpires4ReplayFileSource)
+    ];
+
     /// <summary>
     /// Returns all discovered file watcher sources as test case data.
     /// Each test case includes: Type sourceType, string[] patterns
@@ -23,9 +34,11 @@ public static IEnumerable<object[]> AllSources()
 
         foreach (var sourceType in sources)
         {
-            // Skip Tekken8 (uses wildcard pattern "*.*" with subdirectories - needs special handling)
-            if (sourceType == typeof(Tekken8ReplayFileSource))
+            if (IgnoredSources.Contains(sourceType))
+            {
+                Console.WriteLine($"Skipping source {sourceType.Name} in AllSources test data due to broad pattern and special handling requirements.");
                 continue;
+            }
 
             var patterns = FileWatcherSourceDiscovery.GetExpectedPatterns(sourceType);
 
diff --git a/GamesDat/Telemetry/Sources/AgeOfEmpires4/AgeOfEmpires4ReplayFileSource.cs b/GamesDat/Telemetry/Sources/AgeOfEmpires4/AgeOfEmpires4ReplayFileSource.cs
new file mode 100644
index 0000000..6a9ea4d
--- /dev/null
+++ b/GamesDat/Telemetry/Sources/AgeOfEmpires4/AgeOfEmpires4ReplayFileSource.cs
@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GamesDat.Core.Telemetry.Sources.AgeOfEmpires4
+{
+    public class AgeOfEmpires4ReplayFileSource : FileWatcherSourceBase
+    {
+        public AgeOfEmpires4ReplayFileSource(FileWatcherOptions options) : base(ApplyDefaults(options))
+        {
+        }
+
+        public AgeOfEmpires4ReplayFileSource()
+            : base(
+                  path: GetDefaultReplayPath(),
+                  pattern: "*.*",
+                  includeSubdirectories: false,
+                  debounceDelay: TimeSpan.FromSeconds(2)
+            )
+        {
+        }
+
+        public static string GetDefaultReplayPath()
+        {
+            var documentsFolder = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments, Environment.SpecialFolderOption.DoNotVerify);
+            return System.IO.Path.Combine(documentsFolder, "My Games", "Age of Empires IV", "playback");
+        }
+
+        /// <summary>
+        /// Applies default configuration options if not specified.
+        /// </summary>
+        /// <param name="options">The input options.</param>
+        /// <returns>Options with defaults applied.</returns>
+        private static FileWatcherOptions ApplyDefaults(FileWatcherOptions options)
+        {
+            return new FileWatcherOptions
+            {
+                Path = string.IsNullOrEmpty(options.Path) ? GetDefaultReplayPath() : options.Path,
+                Patterns = options.Patterns == null || options.Patterns.Length == 0
+                    ? ["*.*"]
+                    : options.Patterns,
+                IncludeSubdirectories = options.IncludeSubdirectories,
+                DebounceDelay = options.DebounceDelay == default
+                    ? TimeSpan.FromSeconds(2)
+                    : options.DebounceDelay
+            };
+        }
+    }
+}
diff --git a/README.md b/README.md
index 607f36b..d4f5526 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,7 @@ Out of the box:
 
 | Game                       | Replay/Demo files         | Realtime data                   | Tested |
 | -------------------------- | ------------------------- | ------------------------------- | ------ |
+| Age of Empires IV          | ✅                        | ❌                              | ⏳     |
 | Assetto Corsa Competizione | ❌                        | ✅ Physics, Graphics, Telemetry | ⏳     |
 | Brawlhalla                 | ✅                        | ❌                              | ✅     |
 | Rocket League              | ✅                        | ❌                              | ✅     |