it depends on what you are asking about?
if you mean going on live with PC, yes you can. there are a lot of games out there those go live with Microsoft live games. but if your thinking about playing xbox games on PC, you can just forget about it, cause that has been discussed more often.
Unfortunately, you do have to have an Xbox Live Gold Subscription. However, if you have a 360, you can share your Gold with your PC. Well, you need a gold subscription to play online if you want to play with people who play it on the 360 as well as the PC, but you can play online PC to PC with just a silver account which is free. At least that is what i have heard.
No, you can only play Hetaoni on a PC.
No they are two different platforms. A PC gamer will not be able to play with an xbox user and vice versa.
No. Left 4 Dead Xbox Live Players can only play with other Xbox players. The same goes for PC.
You can play Minecraft anywhere.
what!?!?!?! Yes if a Xbox live member also has the PC game and a PC you will be able to play with a Xbox Live member, when he is using his PC You can not even get on X box live so how do you think you could play someone in a game on Xbox Live when you are on the PC. The games are not compatible even if you were on the same network. Could you put a Xbox 360 game in your computer and play it. No you could not. So why do you think that they could play each other. The Xbox 360 player also could not put the PC game in his Xbox 360 and play it because it is not compatible. The same applies to the other platforms
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.
No, Only on Xbox Live. But to play online on PC, you need to be connected to the internet.
No you can't do this. Unless you are using a game specifically made by Microsoft to play from a PC with Xbox live users. (EG: shadowrun)
No the game is not cross-platform online, so people play the PC version together and people play the Xbox 360 version together, but a PC and Xbox 360 cannot play together on the same server.
i dont think many people play halo 2 pc, but alot of people play halo 2 xbox with xbox live!
you can't but you can get games for your PC that runs through xbox live.. like shadowrun and gears of war 1 are some examples.