Here is a list of Killstreak titles given in the order they appear.
1. First Kill - Only appears for the first kill of the round.
2. Double Kill
3. Triple Kill
4. Quad Kill
5. Multi Kill
6. Crowd Control!
7. Eliminator!
8. Sheriff!
9. Head Hunter!
10. MEGA KILL!
11. MASSIVE KILL!
12. UNBELIEVABLE!
13. ROUND BREAKER!
14. HUMAN NUKE!
15. KING KILL!
16+ YOU ARE THE CURE!!