According to Guerilla Games, Killzone: Shadow Fall can simultaneously deal with 24 AI opponents on-screen at a consistent 60 frames per second, but any more, and performance starts to noticeably suffer.
Expect most encounters to feature 23 or fewer Helghast then. Frankly, that already sounds tough enough, and a fairly impressive technical achievement.
“For me as a game designer what I was really interested in was getting more gameplay elements on screen," lead designer Eric Boltjes explained to OPM. "More enemy types at the same time, more weapon types. Bigger areas. For me that gives us a lot more ingredients to play around with. Previously we were limited. You could have six or seven guys on screen, only two types, and it had to be at a specific range”
OPM pushed Boltjes on the exact number of on-screen Helghast that Killzone: Shadow Fall can safely handle. “Yes. It’s about 24,” he explained, “but that’s just enemy AI. And there are other types of enemy AI, lots of destructibility, lots of dynamic objects. Those have much higher limits but the amount of AI is around 24″.
Apparently “framerate drops” when the 25th foe saunters on-screen. “They’re all autonomous, they create their own effects," Boltjes concluded. "They’re busy little bees. As soon as you push it over  then we get performance issues”.
24 Helghast are likely to present an incredibly stern challenge if previous Killzone games are anything to go by. Are you planning on buying Killzone: Shadow Fall with a PS4 at launch?