The beta, which lets players try out three different online modes, is now available on the PlayStation Store to download. It ends on February 15.
However, according to the official PlayStation blog, the release has been slightly delayed in the US and will instead be out there on February 3 at 10.00am PST.
Killzone 3 will be released on February 22 in North America, February 23 across Europe, and February 25 in the UK.
> Click here to read our hands-on preview of the game