Metal Arms: Glitch in the System (PS2, Gamecube, XBOX)
It's a fun and challenging third person shooter in which you play as a yellow robot with a large arsenal of weapons and help the droid rebellion fight against the Mil overlords. Some weapons include the Cutter, which fires saws that cut off enemy limbs and sometimes causes their torsos to fall over. There's the control tether, which allows you to take control of enemies by hacking into them via their control ports on their backsides, and lots of other weapons.
It's a fun and pretty humorous game and has Dan Castellaneta and Patrick Warburton play as some of the characters in the game. If you have a 360, then you can download the XBOX version off of the Marketplace.
A more recent example would probably be:
Xenoblade Chronicles (Wii)
This game is one of three games that made it stateside via Operation Rainfall. I guess it's technically not that obscure, but it seems like not very many people on here have heard about the game, so I figure I'd let you know.
The game takes nearly everything that's usually frustrating about a JRPG and throws it out the window. There's no random battles, you can save almost anywhere, there are checkpoints in between multiple boss fights, and occasionally, with the power of the main character's weapon the Monado, you can see the future which tells you how much of a certain item you'll need for a quest giver you haven't even met yet.
There are also tons of awesome features the game has. Such as the affinity system which makes it so that the more your party members like each other, the more skills they can share via skill link. This encourages people to actually switch out party members for others from time to time.
There's also the battle system in the game. You don't need healing items or stuff that refills your magic. Instead, your abilities and spells are set to a cool-down system, so you won't be able to spam certain attacks over and over. (Hell, the game's primary healer has a cool-down system which makes her unable to do ANYTHING for a short period of time. So you can't rely on her to heal you at all times.) So the game is able to both streamline the game, but also keep it challenging at the same time.
And going back to the Monado, during battle, you'll occasionally see a vision of an enemy that's about to use a powerful attack on you or one of your party members. After that, you'll have a short amount of time to either use one of the Monado's abilities to counter the attack, or warn one of your party members about it and select one of their abilities to counter it.
It's a very good game, and I encourage anyone who even has the slightest interest in RPG's to get it.