Seinfeld is one of those beloved shows that even 20 years later, fans just won't just let it die. That being said, at least one fan of both Doom and Seinfeld found a way to make it die. Doomworld forum user Doug Keener wanted to combine two things he loves to make the ultimate Doom tribute to the show about nothing.
Ultimately, the mod is really about nothing too -other than shooting all the characters from the show and listening to a few of their most famous lines before you plug them. If you're wondering why a fan of the show would want to shoot everyone on it, well, that's because it's also a tribute to Doom and you can't play the game without spilling some blood.