Tron: Evolution
42 Achievements
13-15h
Boom boom boom
Derezzed 200 enemies while in the Light Tank
4.7%
How to unlock the Boom boom boom achievement in Tron: Evolution - Definitive Guide
You can boost this quickly by replaying chapter 6. You'll need to fight your way past two tanks on foot, which can be challenging. However, once you do so you'll take control of a tank for a lengthy sequence. Each run will net you about 30 additional kills.
At the end of the tank sequence just quit and start up chapter six again.
You can derezz/kill people while in the light tank by pressing . You may get this while playing the Story Mode 2-3 times for Platinum, but you can also get this very easily by finishing the story, then using Chapter Select and replay the light tank part of Chapter 6: The Approach 3-4 more times. If you followed the Road Map and used the Chapter 6 method to grind to Level/Version 50, you would have easily gotten this along the way.
See also 'It's All In The Wrists'
This should come naturally through the mixture of 2 campaign playthroughs and online play, but if you still need a few more kills, head to mission 6 using "chapter select" for instant access to your light tank.