Michaël Ryssen (Kokak)

Michaël Ryssen, alias Kokak, is a French software engineer who created several ports, notably:
 * WinHeretic
 * WinHexen
 * GLHeretic
 * GLHexen
 * DoomGL
 * ZDoomGL (later transferred to Tim Stump (Timmie), who rewrote it entirely)
 * DoomGLES

Michaël Ryssen currently works for UbiSoft