Titan Killer (Archer Heavy Rocket)

is one of the many challenges in Titanfall.

How to Get
This is easy to do if you team up with a small team of people, but it's also possible if you are alone. The best way to get Titan kills is fire the rocket(s) while an enemy Titan is engaging another Titan. (A random player or your friend) Thr Archer Heavy rocket does a lot of damage but try not to engage enemy titans who are alone, because they get an indication that they are being locked on and can use a vortex shield to block the rocket and if they are lucky, throw the missile back and kill you. The electric smoke disrupts the lock and the missile in flight. And the particle wall just blocks the missile from hitting the enemy Titan. But if they are in a fight, they have to ignore the lock indication and continue fighting. This gives you the chance to steal another player's doom but you have to time it right.

The amped variant of the Archer Heavy Rocket fires powerful Titanhammer missiles that deal MASSIVE damage to any Titan. But the downside of this is that it travels very slowly so it can easily be out maneuvered.