Not every game has a Platinum Edition, but the ones that do are normally Xbox 360 games sold as Platinum Hits and the PS3 games are sold as Greatest Hits or game of the year like Batman Arkham Asylum: Game of the Year
Call of Duty 4: Modern Warfare (Greatest Hits) for the PS3 is a Xbox 360 Platinum game
No
Sonic's Ultimate Genesis Collection
By completing every other trophy in a game that supports trophies.
unlock all other trophies in a game
no but there isn't any for that game
you can play any ps2 game on the ps3
If you are asking if there is any Software to play a PS3 game on a PC the answer is no.
Yes all PS3 can play any PS3 games if the have current updates which includes the latest 3D games
No, PS3 games are region locked. There's a number on the side of the game and it has to match the number of your PS3. An earlier answer said the answer was yes any PS3 can Play any game
Fortunately, any ps3 game around the worlds can work on any ps3. This is not possible for blu-ray dvds though.
No you can not get Halo for the PS3 or Wii
No a Nintendo 3DS can not play a PS3 game of any title