Minerva is a Half-Life 2 single-player mod, which immediately makes it notable simply because there aren't many of those. And its being good as well puts it practically in a category unto itself.

After at least a year (I don't remember when the last chapter was released exactly) the final two chapters (for a total of four) were released about a week ago. Having loved the first two -- I thought they were in many ways an experience superior to that of the actual Half-Life 2 -- I eagerly anticipated more great level design, pretentiously enigmatic Marathon-esque narration, haunting music, and so on.

I was disappointed. (Spoilers in this review . . . as always.)