- "Kill 50 Taken using flashbangs".
- "50 Taken have felt your fury. Also, your flashbangs".
With the limited amount of flashbangs in the game, it is best to try and kill the Taken in clusters or groups. You can either run in circles around the Taken or you may run a few yards (neters) so where they are all chasing you in one neat group and then throwing your flashbang into them. Completing this achievement in one run-through takes quite a bit of conviction and determination due to the scarcity of the ammo, so it may be best to plan for several playthroughs.