Killzone 3 dev diary is gameplay-filled, genuinely upsetting

There's a massive amount of gameplay in the Killzone 3 dev diary posted below, so fans of the series should definitely scope it out. However, fans of not seeing dudes get their faces, necks, eyes and chests absolutely ruined by knives might want to go look for slightly friendlier videos.

This article was originally published on Joystiq.