There were about a trillion incredible games on the PS2, so we won't blame you if you haven't heard of Odin Sphere. It was a side-scrolling action RPG released pretty late in the console's life, but there was one thing in particular that made it incredible: all the gorgeous hand-drawn art.
Like its spiritual successor, Muramasa: The Demon Blade on Wii, Odin Sphere looks like a painting, even when you're playing it. And its old school hack-'n-slash action is great.
This week only, Odin Sphere is only $4.99 on PSN, so go download it in glorious HD if you haven't played it already. It's totally worth it.