Xenon 2 (the follow up to Xenon) is quite a different game to its predecessor.  In fact the only real commonality is that both games are vertical scrolling games.  Having said that, Xenon 2 is a great game.  It has fantastic graphics and is very challenging.

The interesting twist for Xenon 2 is that it is possible for the player to 'back up' and fly down the screen as well as up the screen:

Xenon 2 under Virtual PC   Xenon 2 under Virtual PC   Xenon 2 under Virtual PC

Xenon 2 also runs perfectly under Virtual PC.

Cheers,
Ben