[新闻] 并不是所有游戏联机都需要ps+

Some online games (like some F2P titles) don't require PS+ paywall. #1
http://game.watch.impress.co.jp/docs...12_603363.html

Exerpt from above URL

YosP: For network games requiring subscription or F2P games, PS+ may not be mandatory (up to the publishers).
For example, games such as Planetside 2 or DC Universe Online don't require PS+ subscription.

简单讲就是免费游戏不需psn+，需要ps+与否由发行方定制。。