A RPG/shooter hybrid. You are a convicted felon in the future, accused of a crime (not detailed) and sentanced to 2000 years. Instead of putting you into prison, they instead send you to a prison planet to live out your sentance. you are modified with nueral device that copies all you bodily information (aka, stats, abilities, skills and such), and if you die, they will respawn you, making it so you have to live you whole 2000 years. But there is a catch, if you attempt to escape from the planets orbit, and succeed, your sentance is voided, and you are free to go. So the end game itself will involve actually attempting to escape, or rest in the knowledge that you will remain here for 2000 years, and get to work killing shit. If you do attempt, you can either succeed which ends the game (and I mean ENDS, as in PERIOD! no playing after, start a new character), or you fail, in which case, your character is cyro-tortured (cyrogenically frozen, but you brain is kept functional, so you are aware) for half your sentance...) than you are executed.
It would best be a kind of Single-player MMO hybrid, where you can play it alone, or link up to the community, and see other players also. Instead of gaining levels and expeirence, you just get money, which you can spend on increasing you abilities, modifing yourself with either genetics (aka, splicing like in Bioshock, making you kinda like a magic user), cybernetics (which will be limited at 90% total augmentation, so the more augmented you are, the less human you become), or nanotechonology (the least evasive, but the most expensive). Yopu could also spend that money on training to up your skills, buying new armor or equipment, and other such things.
In place of quests, there are jobs that pay money. These are not all like the, "'Our town is going to be attacked by trolls, you are our only hope' says the mayor to 'the chosen one' player #8,967,168".
Death will be handled, like already mentioned, by having your character die, and be respawned. But if you do die, all the gear on you will be left to be looted by others. Though, there wont be legendary items thatr will be taken, most of the legendary items will most likely be heavily modded weapons and armor the player can make.
The weapons will have a large selction, and will also feature a set-up kinda like a cross between Blacklight: Tango Down and Army of Two: 40 days; you have a few different weapons types, like pistol, rifle, and shotgun, but tons of different pieces to take and combine to make all kinds of different weapons, like a rifle could be made into a belt-fed sniper with a undermount shotgun, or a pistol could be converted into a SMG with the right parts. Armor likewise will be different pieces and layers of cloth, leather, and metal, with cloth giving the most freedom of movement (besides being completely naked) and metal or what ever is higher giving the most protection from damage.
Your character would be very customizable, along the lines of the new EVE avatar thing. There would be 5 body archetypes, Light (which makes your character fast and small, allowing them to fit into vents and hidding places, but take very little damage) normal (the even build), muscualur (strong and powerful, but less graceful and slower), Big (overwight, offers some stregth, and added damage absorbtion, but slowest and some stat punishers), and "sexy" (basically a sexualized form which has some similur stats to normal body type, but with added alur to NPC and such). Also, as it would not take long for someone to do it (come on... its the internet) these avatars would can be fully nude, and automically correct. (this will most likely get FOX in an uproar, but this game is going to be at least M rated, and an MMO with monthly, though very, very cheap, fees.
It would most likely be a PC exclusive, will feature a single player part, which is basically a like the main MMO part, but playable even without a membership (just alot of the actual fun will be gained from the interaction with other players.)