RealTime Auto-Save feature?

http://apps.facebook.com/paradisepaintball

Do you know paintball paradise?


In this game, if you play game, it looks something stores your activity and record all of those. And show you after.


Like this game, if user just play and when playing game, click above tab and change category to shop or stats window, the game must know all of his acts and stores it.

I think this is realtime autosave feature. And this is essential to web-game. Because people don't want to click save and exit directly himself.

How ahieve this?

 

http://lmgtfy.com/?q=unity3d+save+game

Just run your saves periodically, perhaps every level or every key event or every X seconds?