XCOM 2
87 Achievements
Our New Overlords
Promote a SPARK unit to Champion rank
4.6%
How to unlock the Our New Overlords achievement in XCOM 2 - Definitive Guide
Champion is the seventh and last rank a SPARK can get to. Soldiers gain experience by defeating enemies in combat or, to a much lesser degree, by being in the same mission when a squadmate defeats an enemy. So just be sure to take your SPARK in as many missions as possible and try to have them deal the final blow to enemies.
You will be able to choose an upgrade with every rank gained. Personally I think the best upgrades for this achievement are:
-Adaptive Aim.
-Strike.
-Wrecking Ball.
-Bombard.
-Channeling Field.
Remember SPARK´s are immune to fire and poison damage and can climb vertical distances without a climbing aid (ladders, pipes, etc).
Finally, SPARK´s don´t heal the same as conventional units. You will have to put them in engineering between missions, you can only repair one at a time.
The SPARK unit is the new soldier class in the game. You will receive one after completing the Lost Towers mission (see A Torch Passed) but you can create more from the Proving Ground. These are robotic units that use a cannon, SPARK BIT (similar to the GREMLIN) and can be equipped with a single Heavy Weapon but cannot use cover and do not heal by normal means because instead, you must repair them in Engineering aboard the Avenger.
In order to promote a SPARK unit to Champion rank (the maximum rank), you will need approximately 42 kills on Rookie difficulty. This is probably the most time-consuming trophy in this DLC so it would be a good idea to start working on it as soon as you finish the Lost Towers mission.
For more information on the SPARK unit: LINK