diff --git a/StarterNG.Tests/PhysicalFileSystemTests.cs b/StarterNG.Tests/PhysicalFileSystemTests.cs
index 1d0e85c..811e812 100644
--- a/StarterNG.Tests/PhysicalFileSystemTests.cs
+++ b/StarterNG.Tests/PhysicalFileSystemTests.cs
@@ -21,6 +21,20 @@ public sealed class PhysicalFileSystemTests : IDisposable
         Assert.Equal(new[] { path }, Directory.GetFiles(_root));
     }
 
+    [Fact]
+    public void A_pattern_lists_names_in_any_letter_case()
+    {
+        Directory.CreateDirectory(Path.Combine(_root, "PKP", "EP09"));
+        foreach (string name in new[] { "Braniewo.SCN", "kato.scn", "notes.txt", Path.Combine("PKP", "EP09", "EP09.FIZ"),
+                                        Path.Combine("PKP", "EP09", "ep09dumb.fiz") })
+            File.WriteAllText(Path.Combine(_root, name), "");
+
+        Assert.Equal(new[] { "Braniewo.SCN", "kato.scn" },
+                     _files.GetFiles(_root, "*.scn").Select(Path.GetFileName).Order(StringComparer.Ordinal));
+        Assert.Equal(new[] { "EP09.FIZ", "ep09dumb.fiz" },
+                     _files.GetFilesRecursive(_root, "*.fiz").Select(Path.GetFileName).Order(StringComparer.Ordinal));
+    }
+
     [Fact]
     public void An_atomic_write_that_cannot_finish_leaves_what_stood_there()
     {
diff --git a/StarterNG/Infrastructure/Adapters/PhysicalFileSystem.cs b/StarterNG/Infrastructure/Adapters/PhysicalFileSystem.cs
index 14ab1d6..dcdc457 100644
--- a/StarterNG/Infrastructure/Adapters/PhysicalFileSystem.cs
+++ b/StarterNG/Infrastructure/Adapters/PhysicalFileSystem.cs
@@ -91,8 +91,18 @@ public sealed class PhysicalFileSystem : IFileSystem
     public void CopyFile(string sourcePath, string destinationPath, bool overwrite) =>
         File.Copy(sourcePath, destinationPath, overwrite);
 
+    // The pattern matches names in any letter case, as on Windows: the game's data,
+    // made there, has X.SCN as well as x.scn.
     public IReadOnlyList<string> GetFiles(string path, string searchPattern = "*") =>
-        Directory.Exists(path) ? Directory.GetFiles(path, searchPattern) : Array.Empty<string>();
+        Directory.Exists(path)
+            ? Directory.GetFiles(path, searchPattern, new EnumerationOptions
+            {
+                IgnoreInaccessible = false,
+                AttributesToSkip = 0,
+                MatchType = MatchType.Win32,
+                MatchCasing = MatchCasing.CaseInsensitive
+            })
+            : Array.Empty<string>();
 
     // A folder it may not enter costs what is in it, not the whole listing.
     public IReadOnlyList<string> GetFilesRecursive(string path, string searchPattern) =>
@@ -102,7 +112,8 @@ public sealed class PhysicalFileSystem : IFileSystem
                 RecurseSubdirectories = true,
                 IgnoreInaccessible = true,
                 AttributesToSkip = 0,
-                MatchType = MatchType.Win32
+                MatchType = MatchType.Win32,
+                MatchCasing = MatchCasing.CaseInsensitive
             })
             : Array.Empty<string>();