By completing every other trophy in a game that supports trophies.
No
Sonic's Ultimate Genesis Collection
unlock all other trophies in a game
Personally i would say Heavy rain and the trophy where you complete the game with all players still alive its a short game but its easy to get in to aswell
try nextgenupdate ,,, or download xploder its £14.99 but theres every platt game save on there
When you get all the trophies that the game offers you will receive what is called a Platinum Trophy and that means you have gotten all trophies possible for a 100% total.
The Pickachu in Pokemone Platinum is in the Trophy Garden.
If you already have a platinum trophy for the game, then you will get to keep your platinum trophy once the new trophies are added, you wont, however; have 100% completion anymore, for that you'll have to get all the new trophies.
Unlock all the other trophies, then you will get the platinum.
trophy garden
trophy garden
in the trophy garden