After finishing the game in story mode without continuing, you will unlock superhard mode! to access it, highlight the "hard" option at the difficulty-select screen in story mode and press the z button; the "hard" button will change to "s-hard."
To get virus level 21 just beat virus level 20 in classic mode.Now to get level 22 you must beat virus level 21, when you finish the game credits will appear, but DON'T TURN OFF THE GAME.When the credits are done scrolling virus level 22 appears with 92viruses, but there are no redo's. If you lose you have to beat virus level 21 all over again.
GamesRadar is the premiere source for everything that matters in the world of video games. Casual or core, console or handheld - whatever systems you own or whatever genres you love, GamesRadar is there to filter out what's worth your time and to help you get even more from your games. We deliver the best advice, the most in-depth features, expert reviews, and the essential guides for all the top games.