I've been working for a month in the conversion of my HLDM map "suspended" which you can find here >> http://twhl.co.za/mapvault_map.php?id=4102
Given the original map, this one doesn't have any specific theme.

This HL2DM version benefits from the usual source engine improvements: better lighting, custom materials, 3D skybox, props and other detail.
After tweaking spawn placement and removing HDR, the map is finally available for download. This is hopefully the final version.

If anyone is interested in testing, please let me know! I actually want this map to play well

This map takes place in some sort of Egyptian tomb, where you will find combat as well as some little puzzle solving. If you are looking for a long and challenging SP map, this might not be what you want. I still think it's worth a look.

There is a bug I am aware of, which you will only encounter if you backtrack in a certain place. I might fix it in the future. Right now I don't consider it worth another compile.

Custom textures by me, so I apologize if some of them look cartoony.
The whole build time (including creating the WAD file) was somewhere between 20-15 days. Enjoy the map.

The map takes place in an aquarium facility, home to different species of sea animals.
It has a pretty big size and is better suited for long range weapons.
R_speeds in this scenario are also higher than what I usually do in HL1 because of the detail needed. The r_speed limitation prevented me from making the architecture I originally had in mind. I will probably make a Source map with a similar theme in the future.
The lightmap grid in the outside area is also something I'm not happy with.

The hardest part of making this map was probably setting up the aquariums themselves, because it involved creating a great deal of transparent textures.
While the fishes are func_rotating, I managed to use tracktrains for the mantarays, which makes them seem a bit more alive.