Doom (1993 video game)
Doom (typeset as DOOM in official documents and stylized as DooM in other media) is a 1993 first-person shooter (FPS) video game by id Software. It is considered one of the most significant and influential titles in video game history, for having helped to pioneer the now-ubiquitous first-person shooter. The original game was divided into three nine-level episodes and was distributed via shareware and mail order. The Ultimate Doom, an updated release of the original game featuring a fourth episode, was released in 1995 and sold at retail.
Iikka Keränen
In his teens, Keränen programmed freeware games for the Commodore Amiga. Later he created the popular "Quake" mod "Airquake", as well as over a hundred free add-on levels for the "Doom" and "Quake" series of first-person shooters. He was named the top "Doom" level maker of all time by Doomworld in 1998, described as "one of a few pioneer level designers that created the new bottom line for playability and design in "Doom" levels, as well as helping to develop some of the special FX that many level authors now take for granted".