Want to feel old? The first Rayman game came out almost 20 years ago, way back in 1995. Since then, there’ve been dozens of titles across multiple platforms, and one of the most recent is Rayman Origins ($20), which is now available in the Mac App Store from Feral Interactive. Like most of the games in the series, it features classic, 2-D platforming and attractive graphics, but with a multiplayer mode that lets multiple players tackle the side-scrolling…