diff --git a/steam_helper/steam.cpp b/steam_helper/steam.cpp
index 5cad86c6..3cad4e69 100644
--- a/steam_helper/steam.cpp
+++ b/steam_helper/steam.cpp
@@ -880,6 +880,7 @@ static HANDLE run_process(BOOL *should_await)
     PROCESS_INFORMATION pi;
     DWORD flags = CREATE_UNICODE_ENVIRONMENT;
     BOOL use_shell_execute = TRUE;
+    BOOL hide_window;
 
     /* skip argv[0] */
     if (*cmdline == '"')
@@ -985,6 +986,7 @@ run:
     SetConsoleCtrlHandler( console_ctrl_handler, TRUE );
 
     use_shell_execute = should_use_shell_execute(cmdline);
+    hide_window = env_nonzero("PROTON_HIDE_PROCESS_WINDOW");
 
     /* only await the process finishing if we launch a process directly...
      * Steam simply calls ShellExecuteA with the same parameters.
@@ -998,12 +1000,18 @@ run:
     if (use_shell_execute)
     {
         static const WCHAR verb[] = { 'o', 'p', 'e', 'n', 0 };
-        ShellExecuteW(NULL, verb, cmdline, NULL, NULL, SW_SHOWNORMAL);
+        ShellExecuteW(NULL, verb, cmdline, NULL, NULL, hide_window ? SW_HIDE : SW_SHOWNORMAL);
 
         return INVALID_HANDLE_VALUE;
     }
     else
     {
+        if (hide_window)
+        {
+            si.dwFlags |= STARTF_USESHOWWINDOW;
+            si.wShowWindow = SW_HIDE;
+        }
+
         if (!CreateProcessW(NULL, cmdline, NULL, NULL, FALSE, flags, NULL, NULL, &si, &pi))
         {
             WINE_ERR("Failed to create process %s: %u\n", wine_dbgstr_w(cmdline), GetLastError());