There will be a Killzone 3 beta, but only for people who subscribe to PlayStation Plus.
To enter, download the PS+ exclusive Killzone 3 theme on 14th October. If you're one of the first 10,000 to do so, you're in.
Those who qualify can play from 25th October, according to the European PlayStation Blog.
Inside the Killzone 3 beta you'll find the Operations game type, new party system and jetpack and exoskeleton vehicles. Plus, your feedback may alter the final game, so make sure you suggest something memorable.
If you want to subscribe to PlayStation Plus you'll need to buy either a 90-day pass for £11.99, or a year's membership for £39.99.
Killzone 3 has a firm February release date, but there are still a few things unknown. For instance, will there be campaign co-op? Guerrilla games was suspiciously coy about the prospect this passed weekend.
We do know, however, that Killzone 3 will champion new 3D and PlayStation Move technology.
Eurogamer talked to Killzone 3 producer Steven Ter Heide at the Eurogamer Expo 2010.