diff --git a/src/MaaCore/Controller/Win32Controller.cpp b/src/MaaCore/Controller/Win32Controller.cpp
index 0c1a89e930..c57a353b9e 100644
--- a/src/MaaCore/Controller/Win32Controller.cpp
+++ b/src/MaaCore/Controller/Win32Controller.cpp
@@ -135,8 +135,72 @@ bool Win32Controller::start_game(const std::string& client_type [[maybe_unused]]
 
 bool Win32Controller::stop_game(const std::string& client_type [[maybe_unused]])
 {
-    Log.warn("stop_game is not supported on Win32Controller");
-    return false;
+    LogTraceFunction;
+
+    if (!m_hwnd) {
+        Log.info("No window handle available, game may already be closed");
+        return true;
+    }
+
+    HWND hwnd = static_cast<HWND>(m_hwnd);
+    if (!IsWindow(hwnd)) {
+        Log.info("Invalid or stale window handle, game may already be closed, hwnd:", m_hwnd);
+        return true;
+    }
+
+    DWORD pid = 0;
+    DWORD tid = GetWindowThreadProcessId(hwnd, &pid);
+    if (tid == 0) {
+        DWORD error = GetLastError();
+        Log.error("Failed to get thread/process id from hwnd, hwnd:", m_hwnd, "last_error:", error);
+        return false;
+    }
+
+    if (pid == 0) {
+        Log.error("Failed to get process id from hwnd, hwnd:", m_hwnd);
+        return false;
+    }
+
+    HANDLE hProcess = OpenProcess(PROCESS_TERMINATE | SYNCHRONIZE, FALSE, pid);
+    if (!hProcess) {
+        DWORD error = GetLastError();
+        Log.error("Failed to open process, pid:", pid, "last_error:", error);
+        return false;
+    }
+
+    if (PostMessage(hwnd, WM_CLOSE, 0, 0)) {
+        DWORD wait_result = WaitForSingleObject(hProcess, 5000);
+        if (wait_result == WAIT_OBJECT_0) {
+            CloseHandle(hProcess);
+            Log.info("Game process closed gracefully, pid:", pid);
+            return true;
+        }
+    }
+
+    BOOL ok = TerminateProcess(hProcess, 0);
+    if (!ok) {
+        DWORD error = GetLastError();
+        CloseHandle(hProcess);
+        Log.error("Failed to terminate process, pid:", pid, "last_error:", error);
+        return false;
+    }
+
+    DWORD wait_result = WaitForSingleObject(hProcess, 5000);
+    CloseHandle(hProcess);
+
+    if (wait_result == WAIT_TIMEOUT) {
+        Log.error("Terminate process timed out, pid:", pid);
+        return false;
+    }
+
+    if (wait_result == WAIT_FAILED) {
+        DWORD error = GetLastError();
+        Log.error("Wait for process termination failed, pid:", pid, "last_error:", error);
+        return false;
+    }
+
+    Log.info("Game process terminated, pid:", pid);
+    return true;
 }
 
 bool Win32Controller::click(const Point& p)