Well, since I am not fluent in English, I will rely on the translator to write this guide, if you did not understand something from the guide feel free to ask in the comments or send me a message, until now I have discovered a more efficient method to make them tell you many more deaths in less time, I did this on an xbox series x which greatly reduces loading times but I am sure it can also be done on xbox one and even on pc, as a first tip I suggest you choose to do this in a mission where you have accumulated many kills, before fulfilling the last requirement to finish the mission, save and exit the menu to be able to do this method, once this is done, being in the menu continue your game and end the mission, when the screen loads of rewards do not continue, close the game directly and repeat the process, depending on the deaths you have made in the mission they will be added to the achievement when doing this method, in my case I was advancing 1% ca It gives 4 times that it did but there are still missions where you do many more casualties and this process can be made more efficient