You will need a ton of Credits in Resident Evil Requiem in order to exchange them for various items from the Supply Boxes around the city. Acquiring those Credits can be a task in itself, with not very many avenues for doing so available to players.
This guide is all about grinding for Credits quickly and effectively in Resident Evil Requiem.
Farming Zombies
All enemy kills will earn you Credits, so you will ideally kill every single one that you encounter rather than merely evading them as you run past towards your objectives.
Every Credit will add up towards acquiring the improved weaponry you will be buying from Supply Boxes.
Modules
A variety of modules will be dropped by enemies as well, and have no intrinsic utility, despite what the name implies. Instead, simply exchange them for their stated value in Credits at a Supply Box. These modules come in multiple tiers, which provide variations in value as well.
Selling
Most weapon types have multiple variants, and you may want to simply dispose of the lower powered versions in exchange for Credits at any Supply Box. This will also serve to keep your limited inventory space clear.
Retain ammunition as that is not easy to come by, nor are the various consumables.
That is everything you can do to amass Credits in Resident Evil Requiem.