This Seeking Tech guide will show you how to get the Bang For Your Buck trophy and achievement in Resident Evil Requiem.
To unlock this, you need to “defeat at least three enemies with a single Requiem shot.”
When you see a trio of enemies, try to get them close to each other. Once you lined them up, shoot your requiem. If you managed to take out all three, then the trophy/achievement should unlock.
I was able to get this with Leon during the first big combat section in the city streets. Once the car crash, you will be prompted to equip the requiem. From there, you should have at least three zombies chasing you. Walk backwards and try to line them up.
You can check out a video below to see how it’s done: