PS3 owners still not sure about signing up to Sony's PlayStation Plus service (essentially their paid online service ala Xbox Live), might want to think again if Killzone 3 is a game clearly marked in your sights.

By way of the PlayStation Blog, Guerrilla Games revealed a beta for the game's multiplayer component would commence from October 25 to put it through "rigorous testing", however, access is pretty limited as you need to be a Plus Subscriber and even then it's a tough one to sign up for. If you get in, you're required to "[provide] honest gameplay feedback, report bugs and glitches, and help test our network code in real-world scenarios". Rigorous indeed.

"On October 19th, an exclusive Killzone 3 XMB Theme will appear in the Plus section of the PlayStation Store," Killzone community editor, Victor Zuylen wrote. "The first 10,000 Plus subscribers to download this theme (5,000 SCEA Plus subscribers and 5,000 SCEE Plus subscribers) will receive access to the Public Beta Trial."

We also have a new trailer for Killzone 3 right here.