Eye Toy: Groove Cheats on PlayStation 2
To unlock as master difficulty, get an A rank in one of the tracks. You will then have a new difficulty level. It is (as far as I can tell) exactly like hard mode but with less warning when the heads will appear.
Complete tracks 1-20 all the way through on any mode.
Play all twenty tracks to unlock a further five tracks to keep you occupied. The bonus tracks are Gotta Get Through This (Daniel Bedingfield), Keep On Moving (Five), Aserjeré (Las Ketchup), Rubberneckin (Elvis Presley), and Addicted To Bass (Puretone).
To score big, play perfection in the tournament mode against another player. This will hopefully improve your timing.
The following is a list of fun games you can invent to keep the groove going. They are best played with two or more players.
The person with the most amount of perfects wins; points are irrelevant.
Play "Praise you", "Rubberneckin", and "Addicted to Bass" all under the hard difficulty setting. The player with the biggest score out of those three rounds combined wins. Note: This requires the bonus tracks.
Play all twenty five songs in a row on any mode. The player with the biggest score out of all those rounds combined wins. Note: This requires the bonus tracks.
Play "Dance To The Music", "Jungle Boogie", "YMCA", "We Are Family", and "Let's Groove".
Play "Addicted To Bass" in master mode. You will not last long, but the idea is to see how long you last.
Play "Praise You" in master mode.
Set up calorie mode and burn at least 10, 15 or 20 calories.