Today I want to talk about perhaps the greatest 3D platformer of all time (definitely Top 3), Sly Cooper and the Thievius Raccoonus. It is also one of the most underrated.

Like Crash Bandicoot? This game is the perfection of 2D-platformer-in-3D Crash Bandicoot gameplay. Everything about it is awesome: the gameplay, the graphics, the music, the overworlds, the levels, the bosses (especially Mz. Ruby), you name it.
I'll admit the game has some problems. The main problem is that the mini-games (especially the one where you guide Murray through the environment shooting enemies as they pop out) aren't as good as the actual levels, but they are still pretty fun.
The best thing about Sly Cooper, though? It's actually challenging. The health system is almost exactly like Crash Bandicoot's. You die in one hit unless you find a horseshoe (just like the mask in Crash), and you can only collect a maximum of two. You'll die a lot. This aspect is the main problem with Super Mario Galaxy and why I think Sly Cooper slightly edges out SMG.
Stay away from the sequels though. The gameplay is pretty much a GTA clone and you actually have to use stealth and move slowly (ugh). Sucker Punch also did the unthinkable by changing the one-hit system into a health bar. Some people will tell you that the sequels are good, but play them at your own risk.
You can find Sly Cooper at GameStop or someplace for $5 or so, which is an absolute steal.
Have fun.