While SkiFree creator Chris Pirih was a student at the University of Puget Sound, he wrote a text-based game called Ski in Fortran for the VAX/VMS operating system, inspired by Activision's Atari 2600 game Skiing.[8] Later, as a programmer for Microsoft he was writing programming utilities used in the development of software such as Microsoft Word and Microsoft Excel. He had been focused on developing for the OS/2 operating system, but in 1991 decided to learn to write for the newly released Windows 3.0, and so created a new version of his skiing game in the programming language C, replacing the text-based environment with graphics.[8] He called the game WinSki, and added exploitable, fanciful elements to demonstrate the new operating system's functionality, such as staining the snow yellow after crashing into numerous dogs and certain tree stumps transforming into mushrooms when skied on backwards.[2]