Wolfenstein
The "Wolfenstein" series of video games started with the 1981 stealth-adventure video game "Castle Wolfenstein". It was developed by American programmer Silas Warner, a pioneer in the early eras of video gaming, especially the stealth genre. It was published by his (then) company M.U.S.E. Inc. (Muse Software). The player controls an unnamed American prisoner of war as he steals war files containing information about secret German war plans while avoiding or sometimes killing guards, and tries to escape the fortified Nazi stronghold Castle Wolfenstein, set during World War II. The game is often credited as one of the first video games of the stealth genre, since it focuses more on avoiding or disarming enemies, and killing them is considered a last resort.
Wolfgang Engel
Engel then founded Confetti Interactive and Confetti Games in 2009, where he serves as CEO. Confetti is a think-tank for real-time graphics research in the videogame and movie industry, graphics tools developer, and programming services company. Tools Engel has helped develop for the company include Aura, a global illumination system; Ephemeris, a skybox/skydome system; and PixelPuzzle, a Post FX pipeline system. As a part of his role with Confetti, Engel works with external clients, and provides consultations to other game developers. Confetti contributed to games including "Tomb Raider", "Battlefield 4", "Murdered Soul Suspect", "Star Citizen", "Dirt 4", "Vainglory", "Transistor", "Call of Duty Black Ops 3", "Battlefield 1", "Mafia 3", "Quake Champions", and "Phyre".