Having developed a new 3D engine, they opted to remake the 1984 game Castle Wolfenstein. The developers behind the game were id Software, led by programmers John Romero and John Carmack.
The full game was then released weeks later, going on to become both a critical and commercial success (selling over 200,000 copies by 1993). The first episode of the “grandfather of 3D shooters” was released in 1992 by shareware publisher Apogee Software. While Doom is often thought of as the game that kick-started the popularity of the first-person-shooter genre, that honour belongs to Wolfenstein 3D.
