diff --git a/src/details_window.py b/src/details_window.py
index 6ba9eb8..232bf03 100644
--- a/src/details_window.py
+++ b/src/details_window.py
@@ -18,7 +18,6 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 import os
-import shlex
 from time import time
 
 from gi.repository import Adw, Gio, GLib, Gtk
@@ -71,7 +70,7 @@ class DetailsWindow(Adw.Window):
             self.name.set_text(self.game.name)
             if self.game.developer:
                 self.developer.set_text(self.game.developer)
-            self.executable.set_text(shlex.join(self.game.executable))
+            self.executable.set_text(" ".join(self.game.executable))
             self.apply_button.set_label(_("Apply"))
 
             self.game_cover.new_cover(self.game.get_cover_path())
@@ -130,21 +129,7 @@ class DetailsWindow(Adw.Window):
         final_name = self.name.get_text()
         final_developer = self.developer.get_text()
         final_executable = self.executable.get_text()
-
-        try:
-            # Attempt to parse using shell parsing rules (doesn't verify executable existence).
-            final_executable_split = shlex.split(
-                final_executable, comments=False, posix=True
-            )
-        except ValueError as exception:
-            create_dialog(
-                self,
-                _("Couldn't Add Game")
-                if not self.game
-                else _("Couldn't Apply Preferences"),
-                f'{_("Executable")}: {exception}.',
-            )
-            return
+        final_executable_split = final_executable.split()
 
         if not self.game:
             if final_name == "":
diff --git a/src/game.py b/src/game.py
index 865e793..f0ae5e4 100644
--- a/src/game.py
+++ b/src/game.py
@@ -19,10 +19,12 @@
 
 import json
 import os
+import shlex
+import subprocess
 from pathlib import Path
 from time import time
 
-from gi.repository import Adw, Gio, GLib, Gtk
+from gi.repository import Adw, Gio, Gtk
 
 from .game_cover import GameCover
 
@@ -175,15 +177,28 @@ class Game(Gtk.Box):
         self.last_played = int(time())
         self.save()
 
-        argv = (
-            ("flatpak-spawn", "--host", *self.executable)  # Flatpak
+        args = " ".join(
+            [
+                "flatpak-spawn",
+                "--host",
+                "/bin/sh",
+                "-c",
+                shlex.quote(" ".join(self.executable)),
+            ]
             if os.getenv("FLATPAK_ID") == "hu.kramo.Cartridges"
-            else self.executable  # Others
+            else self.executable
         )
 
-        GLib.spawn_async(
-            argv, working_directory=str(Path.home()), flags=GLib.SpawnFlags.SEARCH_PATH
+        print(args)
+
+        subprocess.Popen(
+            args,
+            cwd=Path.home(),
+            shell=True,
+            start_new_session=True,
+            creationflags=subprocess.CREATE_NEW_PROCESS_GROUP if os.name == "nt" else 0,
         )
+
         if Gio.Settings.new("hu.kramo.Cartridges").get_boolean("exit-after-launch"):
             self.app.quit()