Defense Grid: The Awakening

Real easy achievement if you follow the videos below. Using this method you won't lose any cores, easily get a gold medal and get a decent score on the leaderboards.
Credit to zaybytes for the videos.

I found a pretty easy way to do this achievement. I loaded up the Standing Order map and mostly used Concussion towers. To start, I only put 2 Concussion Towers on the left side of the oval loop the creeps march on. Then I put two Concussion Towers on the right side. In the middle I put a Temporal and a Command tower. Then I upgraded all 6 towers to level 3.

This got me to wave 55 without a creep touching any cores (which gives more interest). At this point they started picking up cores so I blocked off the route up top with 2 gun towers and then built 6 Concussion towers on the half circle on the left. After upgrading them to level 3 towers I just sat there with my finger on RB for the next 44 waves.

Pretty easy, I had 2.33 million resources left over by the end and got rank 360 on the leaderboards.


Initial Setup


First Group of Towers by Wave 7


Fully Upgraded by Wave 23


Final build by Wave 50

Just follow the video

This is actually pretty easy, try it on Seat of power.
There's no aircraft on this map so thats one less thing to worry about, but it is far enough in to have concussion.
You tend to get small aliens attacking so make sure you have a couple of concussions out, lasers and tesla can clean up the rest. Create paths upstairs to increase the route and you should be fine.

Managed to do this first try without losing a core.