RAGE 2
65 Achievements
1,435
42-52h
Efficiency
Use the Assault Rifle to kill 5 enemies in a row without reloading
30
31.69%
How to unlock the Efficiency achievement in RAGE 2 - Definitive Guide
So this is a very basic achievement which has you get 5 kills with the assault rifle without reloading. You get the assault rifle very early on in the tutorial mission. Once you have it, simply line up your shot for 5 headshots and you can get this with the next 5 enemies you see.
If this does prove to be difficult, you can wait until you can upgrade your assault rifle (using 250 feltrite and 1 weapon core mod) to increase the capacity to 52 instead of 35.
Skip to 0:38 for Efficiency
The Assault Rifle is given to you right at the start of the game. If playing on Easy, the first load of enemies you encounter will drop within a few shots. Kill 5 without reloading, use headshots to be more efficient, then the trophy will be yours. You can get this literally anywhere in the game and it will probably be your first trophy.
This is very likely to be your first achievement and can be unlocked during the very first mission when you are given the Assault Rifle. If you're playing on Easy difficulty, enemies will die quickly, so you may want to lower it to Easy for the sake of this achievement if you're on a higher difficulty. Simply find a group of 5 or more enemies and take your time lining headshots up until you have killed 5 without reloading.
You can do this very early in the game when you pick up an Assault Rifle as part of the story. Once you have the Assault Rifle, continue to the next area where you will face some easy enemies that only take a few shots to kill. Aim for headshots and you will easily be able to kill five enemies without having to reload.