Doing some research i could recover some of those projects and i'm going to detail some of the aspects of them and why they ended up being abandoned.
HARDThis mod was supposed to be a "remake" of a mod with the same name (https://www.runthinkshootlive.com/posts/hard/) wich was pretty bad and unnecessarily difficult. The story in the original was different and i changed it to be more "mature" and "canonical" but it was pretty generic overall, basically you were an FBI agent that was sent to the Black Mesa Research Facility to check some stuff but end up trapped during the resonance cascade incident. I don't really know why i wanted to make a remake of that particular mod and i why i was so obssessed with it, i remember that i spent hours watching gameplay videos of that mod just to know how i would make the maps. I actually did some decent stuff and mapping with this mod and learned a lot of things with it but in the end i realized that it was worthless to put such effort in a "remake" for such a bad mod and this is why i left the project and moved on. Unfortunately i couldn't recover maps or screenshots of how it looked like but it's empty page it's still there so you can check it out.
Last-ShiftIt was suppossed to be a collaborative work within me and another argentinian modder. The story was pretty generic too but this time you were a Black Mesa security guard instead of FBI. I originally gave this mod with all the source files and such to this fellow modder i knew so he could make his own mod with it because i had some troubles in my life and i was distancing myself from modding. He did some great stuff with the things i gave to him and actually made a demo wich he shared with me in private, this really inspired me so i decided to began working on it again. The progress was very good and i was satisfied and proud of how things were turning on but all the enthusiasm began to die with the time. The main reason was because i wasn't giving my partner enough participation in the project and i was throwing literally all the work to myself. In the end this exceded me so i decided to cancel the project. This mod actually has some screenshots of the maps on it's main page but i didn't check Wayback Machine so maybe more stuff could be recovered.
Welcome to Black MesaMy first mod ever! Not very much to say about this one, i was experimenting with mapping and trying different ideas. The story had a random scientist as protagonist, it was set in a pre-disaster Black Mesa and had a focus in exploration of the facility. I remember that i was very excited with this project since i was getting a lot of attention and encouragement from the community. Truly a nice and interesting experience with a lot of learning. I never took this mod so seriously, i took it like a phase and transitory thing that i used to boost my abilities and as a first touch with the community. The mod's page along with all the screenshots disappeared a long time ago but i've managed to use Wayback Machine to recover an archived page with some screenshots. Seeing this nowadays amazes me a lot and to be honest i think it wasn't a bad start at all. Lastly, i want to remark that this is the first time i got introduced to J.A.C.K wich is the mapping tool i use to this day!
I have some other stuff that i want to share but in the meantime how about you guys? Do you have any abandoned projects you would like to share? This isn't only Half-Life it can be any other game you want! I would be very excited to read your stories!