Posted on 14 December 11 at 08:30, Edited on 14 December 11 at 08:30 by LV 1 Blue Slime
The best advice I can give you is to the use the map with the gates. The gates break up the enemy so they aren't all chasing you at once (although it can also block you, but I think the benefit outweighs that). It's very important that you go into the wave with devastators (the things that can only shoot in front of them and kill you in like 4 hits) and the wave with the shield guys with your superweapon maxed. That was the key for me, was using the superweapon on those shield guys. And also, a good amount of practice. Took me many, many tries to get it.
The problem with the superweapon is it depends largely on luck, the missile has to hit when the shield is down. If you do manage to get lucky, it is a gamerbreaker though. I'm sorry I can't offer more than that. It is one of the more frustrating achievements on my card.
"Slutty outfit? You're one to talk." "This isn't slutty, it's...strategically placed."