《杀戮地带：雇佣兵》依然以ISA与赫尔盖斯特之间的拉锯战为背景，但与以往不同的是，玩家可以扮演ISA士兵，也可以扮演敌对方的赫尔盖斯特士兵。

游戏的基本系统是任务核心制的，玩家可以通过完成任务来获得资金等奖励解锁新武器装备，本作支持联机。 Get a new perspective on the Killzone trilogy in this PS Vita-exclusive story where you won't take a side in the war between the ISA and Helghast, you'll only take the next job. Play as a ruthless soldier for hire, taking contracts from the ISA and Helghast alike. Gear up for nine intense single-player missions that the regular soldiers can't – or won't – touch. The only good is fulfilling your contract – the only evil is anything that stops you from padding