Titanfall 2
50 Achievements
1,000
15-20h
Robot Army
Acquired 6 or more friendly Stalkers at the same time in the Campaign
15
28.15%
How to unlock the Robot Army achievement in Titanfall 2 - Definitive Guide
Recommended Difficulty: Easy
After being thrown across the gap and then working to the dish area, you'll drop down with the objective of moving the dish closer to you. Before using the controls, use your arc gun to activate all 3 stalker racks in the area to gain the achievement.
Mission Select: The Beacon - Chapter 3
For this trophy, you need to acquire 6 or more friendly Stalkers at the same time, which can only be done near the end of Mission 6: The Beacon. Once you have the Objective for "Get a working module from the dish." You will get a message from BT telling you to check your HUD. Then you will automatically intercept an enemy transmission with Richter saying he has other plans for the Titan. When you get this message, you'll be in an area with a lot of robots working in a circular area. Jump down and search for Stalker Stations with a green panel on the walls above their station pods. Press to equipped your Arc Tool and use the Arc Tool with to activate these Stalker Stations. You will get 2 Stalkers for each green panel that you shoot with the Arc Tool. They will be friendly and kill any enemies that are hostile towards you. Do this to 2 more Stalker Stations with green panels and the trophy will unlock.
During Chapter 6, after getting the Arc Tool, you'll see green panels around the environment that will open doors, move panels, or activate robots that will become friendly. These will always come in groups of two, and I believe there are four total as you travel toward the dish. Three of them are on the same platform, which is the best spot to do this (since the first two from earlier may have died).
Video for clarity https://youtu.be/U1P9wSErrGA