Download the game on PSN – From Dust

The game:
Discover a modern god game where nature is the star: From Dust, the latest original concept by Eric Chahi.
Behold the beauty of a primitive world pulsing with life and face the might of nature.
Beware the danger of a world that is constantly changing under your command.
Control the destiny of a tribe struggling to survive and help it recover its ancestors’ lost powers.
Immerse yourself in a world as exotically beautiful as it is dangerous. A universe where Nature reclaims what is Hers; and you are your people’s only chance of survival.
How to download the game on PSN
Once in PlayStation Store you can browse content and download it to your PS3. To download content simply click on its image, banner or listing to start the process.
Once downloading has started you have the option for the download to Perform in Background. This is part of the download management, which adds your chosen downloaded content to a queue while continuing to browse PlayStation Store.
Selected content that can be purchased is added to your shopping Cart. Once you have finished viewing products that you add to your shopping Cart, you can proceed to the checkout and download. If you've insufficient funds available to complete the purchase, you'll be prompted to add funds to your wallet. A wide variety of credit and debit cards can be used to add funds. Items that you download can be re-downloaded up to a maximum of five times by visiting your purchase history.
Don't worry if you exit the Store while content is downloading. It'll continue to download in the background unless you play a Blu-ray Disc, a game, a DVD or switch the PS3 system off. As long as you're signed in to PlayStation Network your downloads will continue until they are complete. Even if you switched the machine off in the middle of downloading, it'll resume when you next Sign In to PlayStation Network.
Source: http://uk.playstation.com/psn/support/