a while back i made some HL:2 maps... these are the only two that I ever uploaded for others to play. I got pissed off any annoyed with the monotony of mapping/modding so i quit, but if you guys need help, i still have the tools and such. I just won't do anything alone, and I find it incredibly uninteresting (maybe if i was a creative person...)
Here's some maps that I made:
http://www.planetphillip.com/posts/5-ways-to-die-half-life-2/
and it's sequel
http://www.planetphillip.com/posts/10-ways-to-die-half-life-2/
just put them in your HL2 maps folder, then start the game, and type in console "map MAPNAME" without the quotes... pretty easy