Defense Grid 2
65 Achievements
1,000
25-30h
Full Defense
Build 50 towers of any type in one mission.
10
24.13%
How to unlock the Full Defense achievement in Defense Grid 2 - Definitive Guide
Yes, they do.
I was able to do this on level 08 - Boiling Point on Story mode - Easy Difficulty.
It would be even easier to do in practice mode, which I did it again in as an example.
(I'm not sure if it actually unlocks in practice mode, since I obviously already have the achievement. If anyone learns the contrary feel free to say so. If it doesn't work in practice, just follow my tower setup but it'll take a bit longer to actually get it all up.)
I'm not very hip with the youtube, but I did make a clip (in practice mode) showing my tower setup. Feel free to upgrade the towers as needed at your leisure. You will probably need to in later waves, but will have plenty of resources to do so.
http://1drv.ms/ZisOYM
Depending on the level you're on and your remaining resources, you could try to spam towers near the end of a level as well.
As with all other achievements in this game, this will not unlock until you complete the level.
Edit: Leaving the OneDrive link, but here's the embed version.
Edit: Caldo15 - Even if you sell towers they still count.
You can also unlock Annihilator, Gun Crazy, and Siege Breaker using the same Mission 14 map.
See the appropriate link below:
Defense Grid 2
Full Defense (BRONZE)
Build 50 towers of any type in one mission. #PlayStationTrophy
Simply build 50 towers in a single mission to obtain this trophy. You will most likely get this trophy through natural play, but if you didn’t, just start one of the later missions on training mode and the easiest difficulty. Now start building gun towers (boost towers do count, but since they don’t deal damage you risk losing the mission too quickly) and make sure you build enough of them to reach 50. Note that upgrading a tower counts a an extra tower as well. The trophy itself won’t pop until after the mission is completed.
This achievement requires that you build any 50 towers during the course of a single mission. You can sell them without impacting the achievement and they don't all need to be in existence at the same time. This is easily done in Practice mode on any of the Chapter 4 or Chapter 5 maps, although it can be done on any map in the game if you don't mind selling the towers.