Yes, quite soon.
This is up to you. But, my opinion is that you should definitely play ME1 first. You get a better feel on the Mass Effect Universe, and you will be more attached to the game, and will enjoy ME2 a lot more. Mass Effect 1 is a great game, as is Mass Effect 2, but if you have the time and the money, play ME1 first.
The airlock plays no part in the Mass Effect series after the first game. It merely serves as an aesthetic.
Yes, you can choose. The game will ask you when you start new game, but it tends to be better if you make good choices in the first one.
Yes, there will be a third game. Mass Effect have been planned to be a trilogy since the first game hit the shelves. Bioware even said that the series might not end there.
mass effect is a good game, no online so it is just a story mode but with a lot of side missions to keep the game going. it is a third person shooter but i do not recommend sniping in the first mass effect because it isn't steady
Mass Effect 2 is only a single player game. Mass Effect 3 however has provided a multiplayer function to it.
Yes you can, it doesn't make a difference.
Mass Effect and Mass Effect 2
Mass Effect
Yes. Mass Effect is a good game series and you should start playing the Mass effect 1 on PS 3.
Yes,it's a great game. Try mass effect 2 It's a great game too!
Mass Effect 3 will be released on the Nintendo Wii U.