Later this month, Sony will offer all PlayStation Plus members a free weekend trial to Killzone: Shadow Fall's multiplayer. From December 28th through December 31st, PS Plus members can easily try the game's multiplayer and even participate in whatever competitions and tournaments are being held during that weekend.
What's more, you can begin pre-loading the game today so that you can jump into the action the moment the trial begins.
Sony notes that while the weekend trial is only good for multiplayer, the single player content will also be automatically downloaded. Unfortunately, there's no way around this, but you can choose to prioritize the multiplayer download first.
