Willits was listed 10th in the top 10 level designers of all time, according to Doomworld's 5 years of doom.
Willits is a graduate of the University of Minnesota and a former member of the University of Minnesota Army ROTC program. Willits was the battalion cadet-command sergeant major (C/CSM) during his junior year and attended ROTC Advanced Camp at Fort Lewis, Washington during the summer between his junior and senior years of college. After an injury during the summer, Willits completed two rotations, being assigned to both the first and seventh cadet regiments during that summer. He held the rank of cadet-major (C/MAJ) during his senior year and was assigned as the battalion training officer.
Willits worked with Rogue Entertainment on Strife from March to December, 1995. He joined id Software the same year after impressing them with his Empire and Raven series of Doom PWADs. Willits contributed E4M5: They Will Repent and E4M9: Fear to The Ultimate Doom. He would later contribute Attack and Canyon to the Master Levels for Doom II expansion pack.
Many of his levels were designed along with his sister, Theresa Chasar.
- Willits was referenced in the Doom movie as Dr. Willits.
- Quake III Arena is his favorite game.