Reactor has released 'Tristania3D'. It's a tribute to the gothic metal band Tristania. There are 26 normal levels, plus 12 secret levels including super secret and challenge levels. The levels are large and well detailed. The opening 2 levels are mainly outdoors. Virtually all the graphics, sounds and music has been changed and the resulting gothic feel is quite effective. Code changes include textured floors and ceilings, directional sprites, in-game messages and helpart. A well detailed manual is included. Available here.