Gordon's Excellent Adventures Through Time and Space! What happens when you change up the story of Half-Life 2, add in Weeaboo bashing, a Sean Connery ripoff, bad celebrity impressions, and a hell of a lot of ambition? You get a mod that's, at the least, interesting enough to check out.
An edit of d1_terminal, attempting to give it a darker, more melancholy feel.
Looks really good.