ok, so theres a bunch of games i think are overrated because they are too difficult. Basically, the game starts out fun and is great, for awhile, but to beat the game is a real PITA and I see this as a flaw. Examples for me:

ocarina of time
road rash 1 genesis
avp jaguar
zelda 1 nes
cybermorph
daytona usa
virtua racing
all the mortal kombats (cheap ai)
street fighter ai to lesser extent than mk
resident evil 1
zool 2
rayman