Defense Grid 2
65 Achievements
1,000
25-30h
Boot Camp
Finish all the missions in Chapter 1 in Story Mode.
10
21.76%
How to unlock the Boot Camp achievement in Defense Grid 2 - Definitive Guide
Here's a YouTube playlist made by JogandoEAndando with videos on how to beat EVERY mission on EVERY mode on NORMAL difficulty. I've used it from A to Z to beat the game (50hrs) and each guide is perfect. Very nice work from him, congrats!
https://www.youtube.com/playlist?list=PLyx3ruPOCg3_g0ZCN_9in...
The first chapter of the game consists of a prologue and 3 mission. When selecting a mission choose ‘story mode’ right after and complete the full chapter to obtain this trophy.
This requires winning on the Prologue and Chapters 1-3 in Story mode. You can choose Easy difficulty if you find a map challenging, and the game comes with a rewind feature tied to the button so if you make a mistake you don't have to completely start over.
You don't need a particular score or even to keep all the orbs in the core or on the map, merely to end the game with at least one orb still on the map. The developer has stated that it is possible to beat each mission in more than 1 million ways, and having played it enough I would tend to agree with that statement.
If you really get stuck ensure that you actively choose your tower items as you play each map as they can dramatically increase your combat abilities. The items you unlock seem to be somewhat random, but all of them result in more effective towers.
JimmySwizzle87 has prepared videos showing how he obtained gold on each level in this thread, which may give you some pointers on how to beat the map. You also can play co-op (using the DG Coordinated Defense mode) with someone via LIVE to get some good strategies for the Story mode.