Hi,
I released my old Half Life 1 Single Player Levels, but be warned: the graphics are poor, but the gamefun is high I think (at least for me :-P). The zip file contains 2 level packs with altogether 12 levels + 1 bonus level. Read the txts included in the zip to get to know about how to install it and please give me your comments

! RMF data are also included. Do what you want with these files.
It seemed like a gameplay/layout/effect testmod than any coherent level for most of the maps, but there was some very interesting design in some of the maps, as well as a few neat effect tricks like the blinking light in the dark room where the marines are shooting you to simulate muzzleflash.
I played all of version 1, and i stopped playing version 2 when i couldn't figure out what to do next (even with noclipping).
Anyway, this was not entirely unenjoyable to play, heck, it even gave me a couple ideas for effects, which is nice.
Hope to see some moar levels from you with your new skills hopefully.
Version 2 of the level packs only has 3 levels, so you finished it