The demo of Twisted Metal: Head On is about you driving a car around and shooting all around with heavy weaponry wrapped around you twisted metal car. Head on in this twisted race being equipped with all kinds of weapons. Now drive around the twisted metal world heading on to your new race of blowing stuff up like crap and everything there is out there on or off road.
However this is the usual game play to which game players like yourself got used to from The Twisted Metal series.
The Twisted Metal demo is somehow limited from Twisted Metal: Head On full version retail from the game store shelfs. The demo includes just one race and limited number of cars. The gameplay however is amazing in Twisted Metal retail or not. Get twisted metal game from the Twisted Metal official game site.