Zetona said:
I'll start by nominating Age of Mythology, completely overlooked in favor of the Age of Empires and Starcraft franchises, even though it was gorgeous, had a wonderfully-designed campaign, had four unique, customizable races, and let you use divine wrath against your enemies.
I... I love you. Age of Mythology was fantastic. What it needs is a sequel/expansion/whatever with better graphics (optional), more units and technologies, but most importantly new civilizations like Japan, Persia, the Aztecs/Mayans, etc. If that was ever made, the developers would win the internet infinitely many times over.
OT: There's Psychonauts, but also AaAaAA!!! - A Reckless Disregard for Gravity. It's fun, very well-crafted, and one of the most genuinely exciting and heart-stopping games I've played. I would also say Canabalt for similar reasons, but I think that it already has a decent following. Still, check it out if you haven't.