Flying projectiles...

I was wondering: While using a flying projectile, it is possible to have it always facing a certain position? Like, if a missle was to hit an enemy, the missle would always be facing the target, where ever they are, even if they did a U-turn and had the missle still following them.

Sure, you can do that. One way would be to change the facing angle with the same periodic trigger that moves the projectile. Another option would be to add a head bone to the projectile model, and lock the body part facing of the projectile to the target.

I think he is refering to normal War3 unit projectiles, not trigger ones. In that case the best you could do would be to billboard the model, but there is no way to make it turn in the way you want.

The only way to make a normal projectile to turn, is if it was a animation, but then, it would have to be its move or birth animation.

If you're using normal wc3 missiles -> Set Missile Homing Enabled to true.