Seifer is an inactive highscorer and map maker. He highscored from early 2005 to late 2010. At one point, Seifer held the second most 0ths (after Trib4lmaniac), with 41 of them. As of December 17 2010 (around the end of his active playing days), his highscore rankings were as follows:
The flag that represents Seifer in season 4 of Blur.
Number of 0ths: 16 (ranked #8)
Number of top-20 highscores: 48 (ranked #27)
Seifer was also a competitor in season 4 of the highscoring/speedrunning competition: Blur.
Seifer's NUMA maps can be found here.
Seifer was also ranked 11th in ska's list of most influential N players of all time.