Shacknews offers a preview of Rise of the Triad, you can read it over here.
As you'd expect from an update powered by Unreal Engine 3, the visuals already make for a more interesting game. Gone are the flat walls and in their place are textures and lighting that give a better feel of an old monastery. But once you get past the engine upgrades, the game is still just as fast-paced and chaotic as the original, with all the triggers, traps and hidden areas in the usual spots. The sound has been upgraded to give a more realistic feel, such has echoes inside hallways. The music also has been modernized, although the option to play the classic 8-bit original will be included.
The game is anticipated to hit Steam in 2013 for $14.99.