$ip = mapIp($ip);
$game = $_GET['game'];
-$cleanGame = preg_replace('#[^a-zA-Z0-9.]#', '', $game);
+$cleanGame = preg_replace('#[^a-zA-Z0-9._]#', '', $game);
if ($game != $cleanGame || $game == '') {
header('HTTP/1.0 400 Bad Request');
header('Content-type: text/plain');