Bad Moon Rising
Complete Dead Space 3 Awakened.
You will unlock this trophy after completing chapters one, two and three. This can be accomplished within an hour or two and doesn't take too much effort.
Awakened: Kill the Unitologist Cult Leader.
In Chapter 3
you will be in a vision where you see the cult leader, with moons in the background and markers all around. You'll need to periodically shoot the markers when they turn yellow/orange and avoid the cult leader because you can't kill him. After the vision, shit will hit the fan and the cult leader will be on the floor in front of you, kneeling. At this point, you can either shoot him for this trophy or walk by him for True Believer
Awakened: Allow the Unitologist Cult Leader to survive.
In Chapter 3
you will be in a vision where you see the cult leader, with moons in the background and markers all around. You'll need to periodically shoot the markers when they turn yellow/orange and avoid the cult leader because you can't kill him. After the vision, shit will hit the fan and the cult leader will be on the floor in front of you, kneeling. At this point, you can either walk past him for this trophy or shoot him for Heretic
Get to the Chopper!
Awakened: Escape from Tau Volantis to the Terra Nova.
You will get this at the end of chapter one/at the start of chapter two when you get to the ship and escape from Tau Volantis. This will be after a ladder and a part with Isaac and Carver going crazy.
Completed Dead Space 3 Awakened in Pure Survival Mode.
Pure Survival is all about resource management. You need to carefully ration your resources and make what's needed to survive the game. There are close to no item drops at all, and the enemies only drop resources. What you'll need to craft will more than likely come down to health packs and ammo, which of course require somatic gel and scrap metal. If that wasn't enough you also are set on hard difficulty. If you are having absolute trouble you can always use the devil horns and infinite ammunition exploits that are explained in the exploit section of this guide. Doing these pretty much ruin the experience though, since you will have a one-shot kill gun with infinite amounts of ammo. I also highly recommend you play with a friend and just run through the DLC, you can make it to the end in about an hour or two's time.
Just the Tip
Awakened: Craft a Weapon using a MK-II Weapon Tip.
There aren't very many weapon tips in Awakened. The very first one will be right after the first bench, after going through the door turn right to see a MK-II Directed Suspension Field. Pick this up, go back to the bench and craft any random weapon. Additionally, you can get a MK-II weapon tip by buying a resource pack either with real money or ration seals. Buy either the 30 or 60 ration seal costing packs to receive a MK-II weapon tip (check to make sure you're getting the right pack).
Heaven Can Wait
Awakened: Stasis your Co-op Partner when he is downed to slow his bleed out timer.
This is a simple trophy. Get a friend and put them near a regular
necromorph. Let it rip the hell out of your partner and make sure they are downed and not killed, then press
to stasis your partner. They will be in stasis and bleeding at a slower rate, unlocking the trophy.
Awakened: Finish charging the reactor in under 90 seconds.
In Chapter 3 you will get to a large room with a large cylinder in the middle of it. This is the reactor. You need to go to the left and activate a panel, turning on the reactor. Now, you will enter Zero-G. What you need to do here is on the left you will see three different things on the wall, these hold orbs that you will need to put into the reactor. Keep an eye on them, and when a kinesis handle turns blue, use kinesis to open a hatch that gives you the orb. Now you need to stasis the reactor, grab the orb and shoot it into a hole inside the reactor (it doesn't matter which). Then, three yellow cylinders will pop out at the base of the reactor. Shoot these until they explode. Once you do this fly over to a door to the left and open it. This is pretty easy to do in under 90 seconds so you should have little to no problems with this trophy.
Note: I believe the requirements for charging the reactor vary from difficulty to difficulty. In the description above, this is based on a CASUAL playthrough. It had more steps when I played on Pure Survival.