Note: This procedure requires editing a game file; creating a backup copy of the file before proceeding is recommended. With a text editor, edit the "sonic.ini" file in the "windows" directory. Add the following line to the file:
Start up the game and two new menus will appear. The "Stage" menu will allow any stage (including Special Stage 8) to be selected. The "FUNC" menu has the ability to turn on debug mode, turn off the special stage timer, record and play a demo, and uncheck the MMTimer option to place the game in turbo mode.