I used to have an arcade on my site. I integrated the Wordpress arcade plugin
MyArcadePlugin using a couple of Themehouse bridges then gave it a makeover to suit my needs. Used HTML5 games that are widely available for the IPB arcade system. It had highscores, contests and forum widgets - it was fairly basic but worked as intended as a distraction.
I think I was probably one of the only ones that had an arcade for XF 2.x