'power up the generator to make the wormhole work'
Poke646
'It ends as you are stuck in the alien world'
Poke646 as well
Interesting idea, but I prefer more original ideas that distance from those already available and halflife itself. You seemed to put in a backstory, skipped the middle, and then put in the plot twist you probably thought of before writing this. You didn't really explain what you will actually be doing between retrieving gordon and going to Xen.
and on that note, Xen really does suck, please don't make a mod that has anything to do with xen