Quote Originally Posted by gibbi8
Most underated is ICO
Exactly. That game went so long without anybody picking it up, and now the're making a semi-sequal to it because it gained popularity as it aged.

Some other underrated games of mine:

Castlevania SOTN (best 2-D action side-scroller ever!! the soundtrack rocks!!)
Beyond Good & Evil (why did nobody buy this!!!!!)
Final Fantasy 9 (one of the best in the series, but the least mentioned. )
EarthBound (one of the most original rpg's ever)
MegaMan X (awesome side scroller.)
Chrono Cross (good after you get into it)
Illusion of Gaia (great for its time)
Vagrant Story (beautiful work of art)

As for most overated, my following are shown below:

Halo, Halo 2 (good, but not THAT good)
Prince of Persia (just my personal opinion)
Doom 3 (Although beautiful, nothing new)
FF Series (it didn't used to be, but now it is.)
Resident Evil 1-3 (4 really is great though)
Splinter Cell (cleraly influenced by MGS)
Mortal Kombat (how much longer can this series last?)

And as for FF7, it definetly was hiped up and overrated, but it is still one of the best games ever made.