Sony have decided to pull the plug on Killzone: Mercenary's PlayStation Vita servers. The information has been confirmed by Comicbook.com through company support. No warning was given beforehand at all. The decision is a bit surprising as the servers were up and running since 2013 and the player base was quite solid. I believe that some kind of announcement had to come here, but sadly, it didn't.
I didn't play the game myself but I am saddened by this situation. Time to move on to something else, I guess.