Quake was released 20 years ago, so to wish this title and all its offspring a happy 20th birthday, here's 20 of the tops mods across the titles, with some interesting variety for those that really want to kick it up a notch. Enjoy!
20 years of Quake
Dawn of Darkness for Quake 2 is presented there among other Quake 2 mods. Many Quake series related mods are in the link.
I'm one month late :(