Section 8

Easy to boost with a friend if you don't want to run around killing bots. Just have your friend make a custom class and take off all the mods that he has. This will take his shield and health down automatically, making it even easier to kill him. Now have him spawn in the same spot every time so you can kill him until you get the achievement.

I deployed a supply depot a few feet away from where my partner was landing and stood on top of it so I could have ammo regeneration.

Go into instant action put it on Swarm mode.
Easy Computers. Kill 30 players with the Machine Gun.

also, you don't have to kill just enemy players to get the Achievement, you can also kill your Teammates (for those in a hurry to get the Achievement).