diff --git a/android/app/src/main/java/io/github/kichikuou/xsystem35/Launcher.kt b/android/app/src/main/java/io/github/kichikuou/xsystem35/Launcher.kt
index 4cafee9..adecc2c 100644
--- a/android/app/src/main/java/io/github/kichikuou/xsystem35/Launcher.kt
+++ b/android/app/src/main/java/io/github/kichikuou/xsystem35/Launcher.kt
@@ -253,6 +253,14 @@ class Launcher private constructor(private val rootDir: File) {
             }
         }
     }
+
+    fun clearSaveData(): Boolean {
+        var success = true
+        File(rootDir, SAVE_DIR).listFiles()?.forEach { file ->
+            if (!file.deleteRecursively()) success = false
+        }
+        return success
+    }
 }
 
 private fun forEachZipEntry(input: InputStream, action: (ZipEntry, ZipInputStream) -> Unit): Boolean {
diff --git a/android/app/src/main/java/io/github/kichikuou/xsystem35/LauncherActivity.kt b/android/app/src/main/java/io/github/kichikuou/xsystem35/LauncherActivity.kt
index 8d66738..675870f 100644
--- a/android/app/src/main/java/io/github/kichikuou/xsystem35/LauncherActivity.kt
+++ b/android/app/src/main/java/io/github/kichikuou/xsystem35/LauncherActivity.kt
@@ -82,7 +82,7 @@ class LauncherActivity : Activity(), LauncherObserver {
     }
 
     private fun onItemLongClick(position: Int): Boolean {
-        AlertDialog.Builder(this).setTitle(R.string.uninstall_dialog_title)
+        AlertDialog.Builder(this).setTitle(R.string.confirm)
                 .setMessage(getString(R.string.uninstall_dialog_message, launcher.games[position].title))
                 .setPositiveButton(R.string.ok) {_, _ -> uninstall(position)}
                 .setNegativeButton(R.string.cancel) {_, _ -> }
@@ -117,6 +117,21 @@ class LauncherActivity : Activity(), LauncherObserver {
                                        SAVEDATA_IMPORT_REQUEST)
                 true
             }
+            R.id.clear_savedata -> {
+                AlertDialog.Builder(this)
+                    .setTitle(R.string.confirm)
+                    .setMessage(R.string.clear_save_data_confirm)
+                    .setPositiveButton(R.string.ok) { _, _ ->
+                        if (launcher.clearSaveData()) {
+                            Toast.makeText(this, R.string.save_data_clear_success, Toast.LENGTH_SHORT).show()
+                        } else {
+                            errorDialog(R.string.save_data_clear_error)
+                        }
+                    }
+                    .setNegativeButton(R.string.cancel, null)
+                    .show()
+                true
+            }
             R.id.help -> {
                 AlertDialog.Builder(this)
                     .setMessage(Html.fromHtml(getString(R.string.usage)))
diff --git a/android/app/src/main/res/menu/launcher_menu.xml b/android/app/src/main/res/menu/launcher_menu.xml
index 684b112..772b388 100644
--- a/android/app/src/main/res/menu/launcher_menu.xml
+++ b/android/app/src/main/res/menu/launcher_menu.xml
@@ -9,6 +9,9 @@
     <item
         android:id="@+id/import_savedata"
         android:title="@string/action_import_save_data" />
+    <item
+        android:id="@+id/clear_savedata"
+        android:title="@string/action_clear_save_data" />
     <item
         android:id="@+id/help"
         android:title="@string/action_help" />
diff --git a/android/app/src/main/res/values-ja/strings.xml b/android/app/src/main/res/values-ja/strings.xml
index 0a9fb42..9958a9f 100644
--- a/android/app/src/main/res/values-ja/strings.xml
+++ b/android/app/src/main/res/values-ja/strings.xml
@@ -6,9 +6,12 @@
     <string name="action_import_save_data">セーブデータをインポート</string>
     <string name="action_install_from_zip">ZIPからインストール</string>
     <string name="action_licenses">オープンソースライセンス</string>
+    <string name="action_clear_save_data">セーブデータをクリア</string>
     <string name="cancel">キャンセル</string>
     <string name="cannot_find_ald">System 3.x のファイル (*.ald) が見つかりません。</string>
     <string name="choose_a_file">ファイルを選択</string>
+    <string name="clear_save_data_confirm">セーブデータをすべて削除します。元には戻せません。本当によろしいですか？</string>
+    <string name="confirm">確認</string>
     <string name="error_dialog_title">エラー</string>
     <string name="install_dialog_title">インストール中…</string>
     <string name="install_progress">%s を展開中</string>
@@ -16,8 +19,9 @@
     <string name="save_data_export_error">セーブデータのエクスポートに失敗しました。</string>
     <string name="save_data_export_success">エクスポートに成功しました。</string>
     <string name="save_data_import_success">インポートに成功しました。</string>
+    <string name="save_data_clear_success">セーブデータをクリアしました。</string>
+    <string name="save_data_clear_error">セーブデータのクリアに失敗しました。</string>
     <string name="uninstall_dialog_message">「%s」をアンインストールしますか？</string>
-    <string name="uninstall_dialog_title">確認</string>
     <string name="unsupported_zip">この形式の ZIP はサポートしていません。</string>
     <string name="zip_extraction_error">ZIP の展開に失敗しました。</string>
     <string name="usage">
diff --git a/android/app/src/main/res/values/strings.xml b/android/app/src/main/res/values/strings.xml
index a0bb677..5913347 100644
--- a/android/app/src/main/res/values/strings.xml
+++ b/android/app/src/main/res/values/strings.xml
@@ -1,5 +1,6 @@
 <resources>
     <string name="app_name">xsystem35</string>
+    <string name="action_clear_save_data">Clear Save Files</string>
     <string name="action_export_save_data">Export Save Files</string>
     <string name="action_help">Help</string>
     <string name="action_import_save_data">Import Save Files</string>
@@ -8,16 +9,19 @@
     <string name="cancel">Cancel</string>
     <string name="cannot_find_ald">Cannot find System 3.x game files (*.ald).</string>
     <string name="choose_a_file">Choose a file</string>
+    <string name="clear_save_data_confirm">Are you sure you want to clear all save files? This cannot be undone.</string>
+    <string name="confirm">Confirm</string>
     <string name="error_dialog_title">Error</string>
     <string name="install_dialog_title">Installing…</string>
     <string name="install_progress">Extracting %s</string>
     <string name="no_data_to_import">No save/ folder in the ZIP archive.</string>
     <string name="ok">OK</string>
+    <string name="save_data_clear_error">Failed to clear save files.</string>
+    <string name="save_data_clear_success">Save files cleared.</string>
     <string name="save_data_export_error">Failed to export save files.</string>
     <string name="save_data_import_success">Imported successfully.</string>
     <string name="save_data_export_success">Exported successfully.</string>
     <string name="uninstall_dialog_message">Uninstall \"%s\"?</string>
-    <string name="uninstall_dialog_title">Confirm</string>
     <string name="unsupported_zip">This type of ZIP is not supported.</string>
     <string name="zip_extraction_error">Failed to extract ZIP.</string>
     <string name="usage">