Today marks 35 years since the release of Commander Keen in Invasion of the Vorticons - Episode 1: Marooned on Mars, a DOS game that contributed to the formation of id Software. John Carmack's development of smooth scrolling on PCs was a significant achievement during the Enhanced Graphics Adapter era, initially intended for a port of Super Mario Bros. 3. The success of Commander Keen led Carmack and his colleagues to leave Softdisk and establish Ideas from the Deep, which became id Software. The Commander Keen trilogy laid the groundwork for id Software's transition into 3D rendering, culminating in the release of Wolfenstein 3D in 1992 and Doom in 1993. This period marked a shift in PC hardware from 486 to Pentium processors and the rise of dedicated 3D graphics cards. Nvidia introduced the GeForce 256 at the end of the 1990s, with Quake III Arena being one of the first titles to utilize this technology.