The below crossed out answer is pure Myth and fantasy, you can not play a PS3 PC or Wii from your Xbox 360 because of so many reasons.
First the games are not compatible and a patch can not make a game compatible or they would not have to sell and carry all the different versions of games in the stores. That is a huge expense for retailers and also for the game distributors who must stock all the different game versions. Retailers must make store shelves available for each different game in spite of the premium cost of retail space. They are often left with an abundance of one consoles games and a shortage for another also adding to there expense.
There is no way you can put the game in your console for a different version and play it so there is no way to actually play them just because you are both able to go online and the name of the game is the same.
What people do not understand is it is only the names of the games that is the same they are made up of software that is not compatible with other versions having the same name. The actual games are not even close to being able to play each other, Even though there is software that lets a PC and a Mac have communication you still can not put a PC game in a Mac using using software designed for PC/MAC compatibility
Second how are you going to get on the PlayStation Network to Play someone on the PS3. Besides the games design the console has been designed to play only on the PlayStation Network and the Xbox 360 only plays on Xbox Live. If you do not pay for your Xbox live you can not go on line and play anyone. The patch would somehow connect the two networks so they could what. Meet in cyberspace and play a video game. It would be a legal matter if you tried to connect the 2 networks without a lincense from both Sony and Microsoft
The answers is...yes! you can!
But if u have an xbox360 (NTSC/J) format (means if its a Japan model) then you can download a japan patch which will be released on the 12th of July 2009, allowing you to be connected to a dual server (two connections) to play ppl online from an xbox360.
Or you wait until its like 2012 then the patch will be in English
so either learn Japanese or wait 3 years...your choice...
I don't think so. But, 10% pausibilityit is yes.
No there is no way to link the two networks. If you could everyone would get a ps3 because they are free to play online.
Why would you want to? A bunch of screaming 12 year olds play XBOX...
On the Xbox 360
sorry but no...
You can play any online game without Xbox live.
The xbox 360 is made for to play with other people online
Yes, there are many people who play FEAR 3 online on Xbox 360.
No, it is impossible to play with someone who has a different console to what you do, you also can't play xbox 360 - xbox one and ps3 - ps4.
If you mean, can you play a copied Xbox game on your Xbox 360. The answer is yes, but you will need to mod (chip) your xbox.
Yes. But, you cannot play online.
Yes, you can play Halo 2 online on the Xbox 360 using Xbox Live.
You do to play online on the Xbox 360 only. Other systems also have online games
Yup u can and i tried it and it worked on the xbox 360
if it can play on the Xbox 360 then it should be able to go online