Hardcore mode in Dead Space 3 is the hardest difficulty. To unlock this mode, you must complete the game once normally before attempting it.

If you dare to attempt this brutal difficulty, it will be on the hardest difficult. You can Save & Quit the game, but if you die once, the game will erase your save file. This means you must beat the game without dying!

This could be a pretty brutal experience, depending on how good you are at the game. That's why this guide exists, so even the most green Dead Space players can achieve this prestige achievement for their collection!

Visit this link, and download the save file I've provided!
https://drive.google.com/file/d/17FyDnVdgY-zN9LuNujq_w27hKIwo-hLI/view?usp=sharing

This is very simple! Go to your computer's File Explorer and simply find where your Dead Space 3 folder is kept (Not to be confused with the one inside of "steamapps"). This folder is tasked with holding your save files.

The folder we're looking for may be stored somewhere around this-
%USERPROFILE%\Documents\EA Games\Dead Space 3
Once you locate it, simply drag and drop the save file you downloaded earlier from the Google Drive link into the folder with the saves, and you're done!
Yes it's really that easy.

Before you jump in to grab that achievement, when not have a look at the equipment I've prepared for you?

This Save File I'll be providing you is very stacked with med packs and ammunition as seen in the image provided below.

With plenty of med packs and ammo, you'll be more than enough equipped to take on the Brethern Mood final boss.

First up, we have the Planet Cracker with Submachine Gun.

This plasma cutter is highly lethal, and very powerful. Armed with an electrical charge, this weapon is capable of stunning it's enemies while easily cutting through flesh. Even if the plasma cutter's top firing action doesn't finish the job, you can finish off the enemy with the fast firing SMG. All and all, this weapon is a solid partner, and will provide you with your main offense while facing the final boss.

Next we have the Force Gun with Flamethrower

Acting as your defense against waves of enemies, this force gun can repel and dissolve all foes. Equipped with acid bath, enemies you push back will dissolve with acid. This gives you time to walk up to them, and finish them off with your powerful flamethrower. Whenever you find yourself in a pinch during the final boss, use this to clear yourself some space.

Thanks for reading, and I hope this helps you! If there's any problems, please let me know. I'll edit this guide and fix it up as time goes on, so Hardcore mode can be beat easily here on Steam!