Wolfenstein
Silas Warner, an American programmer and an employee of software company Muse Software, was a pioneer of early video game development, especially the stealth genre. He had access to computers in college, and when he worked for the IBM Mainframe architectures before joining Muse Software. The computer he used for game-development, P.L.A.T.O., was one of the firsts with multiple functioning terminals and an example of early computer networks. Warner developed, with P.L.A.T.O., a series of classic video games like his flight simulator and arcade shooter. Inspired by the arcade shooter video game "Berzerk" and the 1961 war film "Guns of Navarone", he developed "Castle Wolfenstein", a stealth-adventure video game in which the player controls an unnamed American prisoner of war as he steals German files containing secret war plans, while avoiding, disarming or at times killing hostile guards and trying to escape the fortified Nazi stronghold 'Castle Wolfenstein', set in World War II. The game was published in 1981 by Warner's company M.U.S.E. Inc. (Muse Software).
Wolfenstein 3D
As development continued, id Software hired their former Softdisk liaison Kevin Cloud as an assistant artist, and moved the company out to Mesquite, Texas, near where Apogee was located. Scott Miller of Apogee was pleased to have his star developers nearby, and agreed to not only increase their royalty rate to 50 percent, but have Apogee create their next game for Softdisk, "ScubaVenture", so that id could focus on "Wolfenstein". The game was intended to be released using Apogee's shareware model of splitting it into three episodes and releasing the first for free, with ten levels per episode. The level maps were designed in 2D using a custom-made program called Tile Editor (TEd), which had been used for the entire "Keen" series as well as several other games. Upon finding out that the team was able to create a level in a single day using the program, Miller convinced them to instead develop six episodes, which could be sold in different-sized packs. Around the same time, the team changed members and structure: id fired probationary president Mark Rein and brought back Jay Wilbur, who had stayed in Shreveport, to be both their CEO and business team; Bobby Prince moved into the office temporarily to record sound effects, while Adrian Carmack moved out of the office to get away from the noise.