Defense Grid 2
65 Achievements
1,000
25-30h
Untouchable
Beat a Chapter 4 mission or higher with zero cores captured.
30
10.2%
How to unlock the Untouchable achievement in Defense Grid 2 - Definitive Guide
I also did the Gun Crazy achievement at the same time so if you don't have that you should get it while doing this one.
I am not very good at explaining what I have done but I have included a video below to show you exactly how I did it which is much better.
https://www.youtube.com/playlist?list=PLyx3ruPOCg3_g0ZCN_9in...
The first mission of Chapter 4 is mission 12. Beat this or a later mission without losing a core for this trophy to pop. You can still obtain this trophy if aliens have captured one or more cores, as long as they don’t bring them back to their base because then you’ve lost the core permanently.
The easiest mission to obtain this trophy in is mission 13 called ‘Deep End’. Play in training mode on the easiest difficulty setting. Now build and upgrade a missile tower on every available spot, sit back and watch the aliens get slaughtered until the mission ends.
A core is captured when an alien escapes off the map with a core. You will need to beat any mission in Chapter 4 or Chapter 5 without an alien capturing a core. Typically if you are aiming for gold, you should do this on every mission in every mode, so it should come as part of working on "Alien Tears" and "Master Strategist". If you are struggling, try lowering the difficulty to easy, play on Practice mode, and watch the videos linked in the guide for "Alien Tears" for pointers on the particular mission you are playing.