diff --git a/ui/steamify-app.sh b/ui/steamify-app.sh
index c77f21c..95f428b 100755
--- a/ui/steamify-app.sh
+++ b/ui/steamify-app.sh
@@ -71,4 +71,9 @@ EOF
 command -v update-desktop-database >/dev/null && update-desktop-database "$APPS" 2>/dev/null || true
 
 say "Starting Steamify..."
+# Started from Steam: stay in the foreground, or Steam counts the game as
+# ended right away and stops giving it the controller.
+if [[ -n "${SteamGameId:-}" ]]; then
+    exec "$DEST/ui/steamify-ui" < /dev/null
+fi
 setsid "$DEST/ui/steamify-ui" >/dev/null 2>&1 < /dev/null &
diff --git a/ui/steamify-ui b/ui/steamify-ui
index 8fa4310..8da4519 100755
--- a/ui/steamify-ui
+++ b/ui/steamify-ui
@@ -20,6 +20,14 @@ import tempfile
 import threading
 import time
 
+# Started from Steam (a non-Steam game, so Steam Input hands it the
+# controller): Steam preloads its overlay into every game, and Qt aborts with
+# it loaded. Start again without it, before Qt is imported.
+if "gameoverlayrenderer" in os.environ.get("LD_PRELOAD", ""):
+    os.environ["LD_PRELOAD"] = ":".join(p for p in os.environ["LD_PRELOAD"].split(":")
+                                        if p and "gameoverlayrenderer" not in p)
+    os.execv(sys.executable, [sys.executable] + sys.argv)
+
 HERE = os.path.dirname(os.path.realpath(__file__))
 
 try: