A new release of the Heretic Port to the Nintendo DS , heres whats new:

Added touch controls for switching weapons, using inventory, and flying up and down.
Added optional music support.
Smoothed out touch screen look a little.
Slowed down the framerate on the automap so it is more reasonable to leave it on all the time.

Download Here --> http://nintendo-ds.dcemu.co.uk/dsheretic.shtml