Call of Duty: Black Ops - The Call of Duty Wiki - Call of Duty: Black Ops, Modern Warfare 2, Call of Duty 4, characters and more Tactical Insertion confirmed. Treyarch claim they're going to police the game diligently to prevent hacking and boosting. We shall see. Also, the killstreaks can't be chained. ie. kills from killstreaks don't count towards further killstreak rewards. Last week I managed a tactical knife triple-kill on a boosting party in MW2 which was a pure delight. Perhaps I'd miss this. sometimes.