After you kill the Boss in the Vault the game credits start to roll, hit escape then you have the option to complete one final task for a cash and points reward, you can then restart the game 'playthrough 2' keeping your character, skill level, weapons etc.
Yes. Mass Effect is a good game series and you should start playing the Mass effect 1 on PS 3.
No. Mass effect 2 wont come out until early 2010. (Janurary through march.)
While not absolutely necessary, Mass Effect has a few story perks from decisions you made in Mass Effect. If you want the full Mass Effect story you should definitely pick it up as nothing does more justice to the game than playing through it.
If you played Mass Effect 1 the second game imports your old game save, so it would depend on how you played Mass Effect 1 as to whether or not Kaiden is alive. If you did not play Mass Effect 1, then the game will default to the character with the opposite gender to Shepard. So Ashley will be there with a male Shepard, Kaiden for a female one. Below is a link which has the important decisions you make in 1 and their effect in the sequel.
It's all on how good you are at the game.
It just effects some interactions and choices in the game.
An increase in velocity has a greater effect on momentum than an increase in mass. This is because momentum is directly proportional to velocity, while mass only has an indirect effect on momentum through its influence on velocity.
If he died in Mass Effect 1 then he is not in Mass Effect 2. If he survived Mass Effect 1 he shows up in Mass Effect 2 but he can not be killed.
Mass Effect 2 should have come with two discs. If you do not have the second one, something went wrong, and it would be best to return it to who/whom you received it from. If that's not possible, you're going to have to go to a store and buy the game again. It will come with the second disc.
No, you have to complete the whole main story mode and depending on what level your at you'll start off with some xp in mass effec 2
If you don't import a save game from Mass Effect, you will automatically choose the character of the opposite gender to survive. If you play Mass Effect first, though, you can choose if you want Ashley or Kaidan to survive. So to play Mass Effect 2 as a female and with Ashley alive, you would have to play Mass Effect and let Kaidan die on Virmire.
Yes, it will e released in early 2010 There will most likely be a third also