This mod takes place during the Black Mesa incident. You take on the role of a HECU Marine as you fight your way through different sections of the facility and carry out varied missions. *This is not a rebuild of any game, but features areas from Half-life, Blue Shift & Opposing force in the Half-Life fashion.
This is a really great mod. The weapon skins and sound are great, the story, while kind of all over the place, is quite good for the most part, and lastly, the last scene is amazing. I highly recommend this mod.