1. Collectibles
1.1. All Collectible Locations (Artifacts, Logs, Weapon Parts, Circuits)
1.2. Peng Treasure Location

2. Story-Related
2.1. Under a Buck (Chapter 4)
2.2. Space Ace (Chapter 7)
2.3. Hungry (Chapter 9)
2.4. Drill Sergeant (Chapter 10)
2.5. Weedkiller (Chapter 14)

3. Miscellaneous
3.1. Payback – Kill a Soldier by TK’ing a grenade or rocket back at them.

All Collectible Locations

There are a total of 257 collectibles (40 Artifacts, 71 Logs, 73 Weapon Parts, 61 Circuits, 12 Blueprints) in Dead Space 3. This video guide will show you all their locations. Blueprints are needed to develop new weapons. Weapon parts and Circuits can be used to upgrade your weapons.
Your collectible progress will be saved after reaching the next checkpoint. If you die or restart the last checkpoint you might have to collect some items again. To check out your progress you can go to chapter select and press triangle (PS3) / Y (X360). You are able to see the progress for each individual chapter. The game has 19 chapters in total.
Finding everything will earn you 6 trophies or achievements: Gun Collector, The Professor, The Librarian, The Armorer, There’s Always Peng!, Aliens

IMPORTANT: To get all of the collectibles in chapter 4,11 and 14 you have to play co-op. Chapter 7 and 12 have no collectibles at all.

Prologue – Artifacts: 1, Logs: 0, Weapon Parts: 0, Circuits: 0
Chapter 1 – Artifacts: 2, Logs: 2, Weapon Parts: 0, Circuits: 0
Chapter 2 – Artifacts: 1, Logs: 1, Weapon Parts: 0, Circuits: 0
Chapter 3 – Artifacts: 1, Logs: 2, Weapon Parts: 2, Circuits: 2
Chapter 4 – Artifacts: 6, Logs: 8, Weapon Parts: 12, Circuits: 7, Blueprints: 1
Chapter 5 – Artifacts: 3, Logs: 9, Weapon Parts: 6, Circuits: 6
Chapter 6 – Artifacts: 1, Logs: 1, Weapon Parts: 1, Circuits: 2
Chapter 7 – NO COLLECTIBLES
Chapter 8 – Artifacts: 1, Logs: 4, Weapon Parts: 3, Circuits: 2, Blueprints: 1
Chapter 9 – Artifacts: 3, Logs: 11, Weapon Parts: 8, Circuits: 5, Blueprints: 3
Chapter 10 – Artifacts: 2, Logs: 1, Weapon Parts: 4, Circuits: 1
Chapter 11 – Artifacts: 4, Logs: 10, Weapon Parts: 9, Circuits: 10, Blueprints: 2
Chapter 12 – NO COLLECTIBLES
Chapter 13 – Artifacts: 1, Logs: 0, Weapon Parts: 4, Circuits: 1, Blueprints: 1
Chapter 14 – Artifacts: 7, Logs: 11, Weapon Parts: 14, Circuits: 13,Blueprints: 3
Chapter 15 – Artifacts: 0, Logs: 0, Weapon Parts: 2, Circuits: 0
Chapter 16 – Artifacts: 0, Logs: 1, Weapon Parts: 4, Circuits: 1, Blueprints: 1
Chapter 17 – Artifacts: 4, Logs: 7, Weapon Parts: 2, Circuits: 10
Chapter 18 – Artifacts: 2, Logs: 3, Weapon Parts: 2, Circuits: 1
Chapter 19 – Artifacts: 1, Logs: 0, Weapon Parts: 0, Circuits: 0

Total Artifacts: 40
Total Logs: 71
Total Weapon Parts: 73
Total Circuits: 61
Total Blueprints: 12

Total Collectibles: 257

FULL PLAYLIST:

There’s Always Peng!
Find Peng
The Peng Treasure can be found in chapter 14. It is hidden within the optional mission called “Reaper Barracks”. To unlock this mission you need to find the Reaper Barracks Key. The key is located in a room that has an elevator and Torque chamber. You will come across this room during the story path automatically. After obtaining the key, mark the optional mission in your RIG and follow the waypoints. Shortly after entering the Reaper Barracks you will have to make your way past a spiked piston trap. The peng treasure is located behind the piston. Use Stasis to slow down the piston and use Kinesis to grab peng.

Under a Buck
Shoot the deer head trophy in the Admiral’s Quarters.
Location: Chapter 4
During chapter 4 you will have to hack the power console of an elevator. Just follow the waypoints and after exiting the elevator look to your left. You basically run right into the deer head. There is no way to miss this location. Just shoot the head with any weapon so that if falls down to the ground.

Space Ace
Shoot at least 70 targets during the ride to Tau Volantis.
Location: Chapter 7
At the very end of chapter 7 you will have to navigate a spaceship. There are 3 types of targets you can shoot. In the first part you can shoot mines. The big mine swarm is the most important thing for this trophy / achievement. There are so many mines at once that it is almost impossible to shoot all of them. Just keep hitting R1 (PS3) / RB (X360) very quickly and take out as many as you can. In the next part you have to shoot some trash that is flying through the air. Try to stay on course so that you can spot all the targets easily. In the last part you just need to shoot some mountains.
You will have to destroy almost every target. There are just a little over 70, so it might take several tries. In co-op it is a bit easier.
Also consider making a backup of your save game after starting the spaceship flight. Otherwise you would need to replay the entire chapter if you fail.

Hungry
Reach the pump room of the Waystation without alerting any Feeders.
Location: Chapter 9
In the very beginning of chapter 9 you will have to activate and use an elevator. The relevant section for this trophy / achievement starts right after leaving the elevator! When opening the next door you will encounter your first Feeder. He will spot you automatically and run away. From this point on you may not be attacked by one of these enemies. Move very slowly from door to door and stay in the shadows. If you are being attacked feel free to restart the checkpoint and try it again.

Drill Sergeant
Complete the Drill Room without taking any damage.
Location: Chapter 10
During chapter 10 you will have to destroy a gigantic drill in some sort of arena. Three waves of enemies will spawn during the fight. Neither the enemies, nor the drill are allowed to hit you.
Before you attempt this trophy / achievement you need some really good weapons. The Slam Chop weapon is very effective for this fight. Always shoot the legs of your enemies and they will die after 1-2 hits. Your secondary weapon does not matter that much, but it should shoot bullets in quick succession which makes it very effective against the drill core.

Wave 1: Enemies die in 1 shot, but some of them start running. Use Stasis and run in big circle around the drill. The drill should kill some of the enemies for you.
Wave 2: Enemies die in 2 shots, but are pretty slow. Keep running in big circles, use Stasis against enemies if needed.
Wave 3: Get behind the drill. It won’t kill you, but all enemies that get close will die instantly from the drill damage and cannot attack you. Use stasis on the drill and take out its core from behind.

You can make use of the “Reload Checkpoint” feature if you need to!

Weedkiller
Kill 5 Cysts in the Biology Building with a single poison gas cloud.
Location: Chapter 14
In the beginning of chapter 14 you will meet Ellie in the Rosetta Lab. She will give you a key for the Biology Building. Just follow the waypoints until you come to the Central Hall door where you have to use the key (cannot be missed). In the corridor behind this door are 5 Cysts. These are some “plants” that shoot explosive projectiles at you. It is very important that you catch their projectiles with Kinesis! The Cysts on the ground will kill themselves if you do not catch their explosives! You can use Stasis to slow them down. All Cysts in this corridor have to survive. After activating the power (cannot be missed) you return to the corridor and activate the switch in the little chamber.

Payback
Kill a Soldier by TK’ing a grenade or rocket back at them.
Location: Chapter 10
You can easily do this in the very beginning of chapter 10 while fighting the first wave of enemies. After going outside a dropship will bring in some soldiers. Hide behind some cover until they throw a grenade. Their grenades are glowing red. Use Kinesis to pick up the grenade and throw it back at any soldier. It doesn’t have to be the one who threw it.