http://www.aspectsweb.co.uk/enjay/doom/njgtb4ts.7z
(just under 90MB).
It's in a 7z file (which shaved a few MB off) but you'll have to take the PK3 out of the 7z and load it to play it.
As I mentioned below, there is a minor visual glitch with the latest official GZDoom (camera textures are bugged) but it plays OK in the latest Git build (I tested it this morning with the build from 20th September):
[edit]
In light of discussions later in this thread, for the time being it seems as if the mod works best if you use one of the GZDoom 1.9 Git builds until a few minor problems are sorted out with the latest version of GZDoom
[/edit]
http://devbuilds.drdteam.org/gzdoom/
Any Doom-based IWAD should be fine for loading it on top of.

It's not much, just a single map. I originally wanted to make a small episode of three or four maps but time and real-life meant that simply couldn't happen. I've managed to get most of what I wanted to do into a single map anyway.
I've had a few bits and pieces lying around on my HD for a while that I always intended to make into a map and when my Summer holiday started I thought I would have an opportunity to finish them off and release something. However, me being me, I got carried away with the idea and it kinda-sorta turned into a one map mini TC. That's partly where the problems start. I spent much of the Summer creating, gathering and modifying resources and DECORATing new weapons and enemies. So that side of the project is pretty fleshed out. However, now that my real-life work has started again, I simply don't have time to do more than one map.
It will definitely require GZDoom. It has lots of models (scenery, weapons, enemies) and loads of graphics not in the Doom palette. It also uses brightmaps, dynamic lights and sloped 3D floors. It works with the current beta of GZDoom and should work with the latest release with one exception. It uses a camera texture in one place and these are broken in the 2.0.03 release. Graf has fixed the bug but I don't think it has seen its way to an official release update yet. I'm sure it will soon. Recent git builds play it just fine.
It will work with any Doom-based IWAD. All the required content is in the PK3. It will even just about function with any IWAD (Hexen, Heretic, Strife) but menus will look messed up and some sound sequences (Hexen) won't work. I was going to make it completely IWAD independent but then I thought "what's the point?"
Part of the original idea was to have a Hollywood "orange and teal" colour scheme and this is evident throughout. However, I didn't try to adhere to this too closely in all areas.
So, what have we got?
A single, quite large map.
Screenshots
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Setting/story: - I'm keeping this very, very short ATM but avoid if you don't even want a hint.
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Gameplay
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