Just because something is old, doesn't mean it can't be used to create great things. Someone took Doom 2, a game that is over twenty years old now, and recreated the famous apartment from Seinfeld.
Doug Keener, a self proclaimed "massive fan of Seinfeld" made a tribute to the series, but managed to keep the main themes of Doom: guns and explosive deaths. Make no mistake, just because Jerry, George, Kramer, and Elaine are able to be killed in the mod, it's not a hate fueled mod.
The modder, Keener, put over 100 hours of work into recreating Jerry Seinfeld's apartment, it's definitely a labor of love. The mod is filled with custom textures and sprites, with each sprite containing audio clips and death animations.
Note: The mod is only compatible with Doom 2 and the latest version of GZDoom. No other client is supported.