Firefly Online – Sneak Peek Firefly Online - Sneak Peek. KeenGamer 2014-10-13 Firefly Online Spark Plug Games developer provided very short video of its new game in development. But as I said it is just a sneak peek. Firefly Online: 3D Environment Engine Sneak PeekWatch this video on YouTube Leave a Reply Cancel Reply Sign in with: Your email address will not be published. Required fields are marked *Comment *You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong> Notify me of followup comments via e-mail.