I'm just reposting what I have read on IGN. Possible NA only. Don't know. So take the info for what it is. All I have got to say I do not see it for free currently on PSN store. It may be updating later. I was looking on the webstore.
"Starting today, anyone can download Need for Speed: Most Wanted on PlayStation Vita, Mirror's Edge on PlayStation 3, and Plants vs. Zombies Garden Warfare PlayStation 4."
Confirmed Work on US, Canadian accounts, as well as accounts for the UK
Need for Speed Most Wanted Vita, Plants Vs Zombies PS4 can be obtained on JPN accounts but apparently Mirrors edge is disc only in Japan. If anybody knows of any alternate for JPN accounts please list thanks.