The Retro Map Pack DLC is available free if you pre-order Killzone 3 from any major retailers, or if you yearn for another replica video game helmet and cough up $130 for the Helghast Edition. It'll also be sold separately.
Killzone 3 is scheduled to launch on February 22, exclusively for PlayStation 3. A multiplayer open beta kicked off today, while a single-player demo is due on February 15, though PlayStation Plus subscribers will get to play it from February 8.
Can't wait to get home and play the beta!