Now you can boost your brain power with 3 full games on 1 cartridge! The brain produces five wavelengths: alpha, beta,delta, gamma, and theta waves. In Mega Brain Boost you get both Brain Boost Gamma Wave and Brain Boost Beta Wave games plus an entirely new game! All three games utilize Makoto Shichida's "right brain development theory" to train your brain. Play a friend in any of the 15 game types to see who's the bigger brainiac Increase your level of difficulty by answering correctly, answer incorrectly and your difficulty level will decrease resulting in a lower score percentage. ESRB Rating: Everyone