We rank the best Xbox 360 games of all time. From Halo 3 and Gears of War to Skyrim, Mass Effect 2, and Call of Duty 4, these classics defined the HD online gaming era.

We rank the best Sega Genesis games of all time. From Sonic the Hedgehog and Streets of Rage 2 to Phantasy Star IV and Gunstar Heroes, these 16-bit classics defined speed, style, and arcade action.

In what is now approaching an honest-to-goodness tradition, below we've put together our list of the many games we're most ...

The Game Boy had several difficult games due to its limited color palette and muddy graphics, but these seven take the cake.