Yes, there are servers on Multiplayer that you can join on 1942.
Assuming you have an Internet connection subscription, yes. You do not have to pay to play PC games online like you do for Live or PS Network.
All the battlefield series are playable online.
Battlefield 1942 is a PC game and can not play on a PSP
NO
No it is a PC game
There is currently no compatibility with browsers for Battlefield. Although you can play them on Xbox 360, PS3, and the PC.
Yes BFBC2 is available for PC.
No
battlefield heroes
Battlefield Heroes is a free to play PC game. It will be coming out around March this year.
Yes, you do.