Complete the following achievements to unlock Xbox Live Gamerscore points.
Achievement
How to unlock
A Cut Above ( 10 points )
Kill 30 enemies with the Ripper.
Air Alert ( 10 points )
Zero-G Jump over 100 times.
All Systems Go ( 20 points )
Complete Chapter 3 on any difficulty setting.
Armstrong ( 10 points )
Shoot 50 objects using Kinesis.
Autofire ( 10 points )
Kill 30 enemies with the Pulse Rifle.
Betrayed ( 20 points )
Complete Chapter 11 on any difficulty setting.
Big Spender ( 10 points )
Spend 300,000 credits at the store.
Brawler ( 10 points )
Kill at least 30 enemies with a melee attack.
Butcher ( 40 points )
Dismember 1000 Limbs.
Cannon Fodder ( 20 points )
Complete Chapter 4 on any difficulty setting.
Crackshot ( 5 points )
Achieve a perfect score in the Shooting Gallery.
Dead On Arrival ( 20 points )
Complete Chapter 1 on any difficulty setting.
Epic Tier 3 Engineer ( 150 points )
Complete the game on the hardest difficulty setting.
Eviscerator ( 10 points )
Kill 30 enemies with the Line Gun.
Exodus ( 20 points )
Complete Chapter 12 on any difficulty setting.
Freeze ( 15 points )
Use Stasis on 50 enemies.
Full Arsenal ( 30 points )
Own every Weapon in the game.
Full Contact ( 10 points )
Kill 30 enemies with the Contact Beam.
Greenhouse Effect ( 20 points )
Complete Chapter 6 on any difficulty setting.
Keeper of the Faith ( 20 points )
Complete Chapter 10 on any difficulty setting.
Lab Rat ( 20 points )
Complete Chapter 2 on any difficulty setting.
Legend Teller ( 40 points )
Collect 150 Logs.
Live With The Hot Ones ( 10 points )
Kill 30 enemies with the Flamethrower.
Marksman ( 5 points )
Dismember 20 Limbs.
Maxed Out ( 75 points )
Upgrade all weapons and equipment.
Merchant ( 10 points )
Collect 8 schematics.
One Gun ( 40 points )
Beat the game using only the Plasma Cutter.
Pack Rat ( 10 points )
Store 25 Items in the Safe.
Pusher ( 10 points )
Kill 30 enemies with the Force Gun.
Ragdoll Check ( 5 points )
Force an enemy into a Gravity Panel 5 times.
S.O.S. ( 20 points )
Complete Chapter 7 on any difficulty setting.
Story Teller ( 20 points )
Collect 75 Logs.
Strange Transmissions ( 20 points )
Complete Chapter 8 on any difficulty setting.
Surgeon ( 20 points )
Dismember 500 Limbs.
Survivor ( 50 points )
Complete the game on any difficulty setting.
There's Always Peng! ( 15 points )
Find the Peng Treasure.
Tool Time ( 10 points )
Kill 30 enemies with the Plasma Cutter.
True Believer ( 20 points )
Complete Chapter 5 on any difficulty setting.
Wreckage ( 20 points )
Complete Chapter 9 on any difficulty setting.
Z-Baller ( 5 points )
Complete Level 6 in Zero-G Basketball.
Backstory Logs
Beat the game.
Defeating the final Boss
Do not be intimidated by its size. Though massive, it is very easy to kill. The following was done under the Medium difficulty setting. Upon starting the fight, notice you are "caged in" by the Boss' tentacles. Notice the yellow "blooms" around the Boss' mouth. Shooting each one will get you closer to killing it. However, upon shooting a few of them, the boss Grabs you, holding you in the air. During this time, it appears that you are helpless. Aim whatever weapon you are using at the time and shoot the yellow blooms. After a few shots you will be dropped. The Boss will then begin slamming its tentacles at you more frequently. They are very easy to avoid. Strafe left to right constantly. They will never hit you. The Boss will roar, shoot a few exploding cells at you, or will drop enemy pods upon you. This is part is also easy, considering it is usually only two small Necromorphs. After you destroy the blooms, you will notice a "caged" area underneath the beast. Under this rib cage lies its many hearts. Again, use same strategy with the whole tentacle scenario. After a few times, the Boss will have his fit and open up again. Unload and the Boss will come tumbling down.
Defeating the Hunter
The Hunter is a regenerating Necromorph that cannot be killed. The first time you encounter him is difficult, and you just have to run. It is best to shoot off his legs because he does not regenerate them immediately. He is much slower without legs. Then, freeze him and he will be taken away. When facing him again in a later act, use the same strategy then fry him with the rocket engines. Collect the Power Node that it drops.
Finding the Peng treasure
To get Peng you must be on the flight deck on Chapter 11. When in the flight room where your ship "used" to be, look between the walkways. It is in the gap between Runway 1 and 2 by the shuttle in the Flight Hangar. You should see a very small statue that has a golden appearance. Pick it up with kinesis and you will receive the Peng treasure (and its achievement or trophy). It can also be sold for 30,000 credits.
Hidden message
Take the first letter of each chapter and arrange them in order to spell out the sentence "Nicole is dead".
Impossible Difficulty Setting
Finish the game once on Medium difficulty.
Keep Military suit for Impossible difficulty
First, you must beat the game on New Game Plus mode, with the Military Suit bought and equipped, and save the game right before the last boss. After the game ends and the credits roll, skip them, and do not save the game when it asks you to. Instead, immediately start a completely new game on Impossible difficulty, and you will start the game wearing the Military Suit.
LV6 Suit Schematic
Complete the game in Normal difficulty.
Military Suit
Finish the game once on Medium difficulty.
More Oxygen
When in outerspace and low on air, simply press start the press X,X,Y,Y,Y and you will hear a chime. After unpausing, you will have full oxygen again.
New Game Plus
Save after finishing the game. Then, load your CLEARED GAME save. You will start a new game on the difficulty which you previously beat the game with all you Items, all your upgraded equipment, including 10 extra power nodes, 50,000 extra credits, and the schematic for the Military suit (a LEVEL 6 SUIT that costs 99,000 credits).
Playing Catch (10)
Catch a Brute or Leviathan Pod using Kinesis.
Prevent Necromorphs
When there are a lot of dead human bodies around, stamp on them to decapitate some limbs. This prevents them being turned into Necromorphs if one of the sting ray-like Necromorphs that brings them to life appears.
Secret Achievements
Complete the following achievements to unlock Xbox Live Gamerscore points.
Achievement
How to unlock
Brute Force ( 15 points )
Kill a Brute.
Don't get cocky, Kid ( 10 points )
Survive theADS Canon with over 50% Shield strength remaining.
Exterminator ( 15 points )
Kill the Leviathan.
Get off my ship! ( 15 points )
Kill the Slug Boss.
Kickin' it ( 10 points )
Defend the Lurker grab attack 10 times.
Mindless Prey ( 30 points )
Kill the Hive Mind.
Playing Catch ( 10 points )
TK catch a Brute or Leviathan Pod.
Slugger ( 10 points )
Kill the Slug Boss with more than 50% Shield strength remaining.
Secret message key
In Chapter 1, just after you repair the claw for the tram hit your objective finder. Follow the blue line into the hall way where you need to go. Stop as soon as you enter the hallway and look up at the catwalk above your head. Ignore the alien for now. Walk until you find the first corridor on the right. Walk into it there to see writing in an alien language all over. Look down there to see a message that says in English that reads "Don't listen to their lies, read what they're really saying." Keep reading to find a key that shows the alien language, and below that the corresponding are English letters from A to Z and 1 through 0. Although not everything will be legible, you should be able to decipher enough to understand what is written.
Slowing the regenerating hunter
To slow down the regenerating hunter for the longest time possible, cut off all the limbs of the hunter with the plasma cutter. Thenm shoot the hunter with the stasis field (if it is charged). This will allow you to get around and away from it while focusing on whatever else is attacking you.
Twinkle Twinkle Little Star
Begin Chapter 10. Walk into the room with the dead Unitologists in it. Listen carefully to hear "Twinkle Twinkle Little Star" from one of the game's trailers.
The song can also be hard in an elevator in Chapter 6.
