Complete the fifth stage without using the counter option when it pops up. Be careful using the evade in combat as you may accidentally trigger a counter attack. Honestly, it's best just to forget about the teleport/counter button completely while going for this achievement. When you get to the boss, you'll need to use flashbangs to stun him to do damage instead of countering. If you play through this chapter on easy, you take so little damage and you kill so fast that this achievement isn't hard at all.