Well, the original Fallouts are pretty underrated. I know the first doesn't fit into the last decade, but I think that 2 and Tactics do. And the Disgaea series. That series is completely brilliant; it's like the Half-life 2 of the tactical RPG genre; and yet, it doesn't receive anywhere near how much praise it should. Hell, if Yahtzee played it, he might actually like a JRPG for once. He sure as hell won't like it as much as Portal, especially since he won't even like Portal 2 as much as Portal; but he'll probably find it to be damn good compared to all of the Final Fantasy bollocks they force 'im to play every little once and a while.