Minimum playthroughs : 3 (one required for a weapon achievement)
Dead Space is an easy 700 odd points if you do just that. Play it on easy. The rest of the points involve playing it on "Impossible" (very hard) mode and a few annoying tricky ones. Like completing the entire game with one gun. But Dead Space is also one of those rare games with cheats and they DO NOT AFFECT achievements. Also the bosses on this game are very lame on easy.
There is also a collectible achievement, as with a lot of games these days, however these are not too hard to find as you there are more available in the game than needed for the achievement. So you could easily miss a few and the achievement will still unlock.
The only slightly irritating aspect of this game is that it is very linear. So if you were to miss an opportunity to get an achievement, and it was in the last chapter, then you will need to replay the whole game again to get to that point. My advice is to save often and if luck out on a achievement, just reload the save. Best to check this guide and note the level where the achievement occurs first.
One final note. If you beat the game on easy, finish watching the credits, as it will reward you with goodies and extra cash. You will also unlock Impossible mode and if you continue with the same save, you keep all your weapons and upgrades.
SEE TAB BELOW FOR CHEATS
ACHIEVEMENT GUIDE
Dead On Arrival - 20 points
Complete Chapter 1 on any difficulty setting
First time, play it on easy and use the cheats if you are pressed for time. I blew all money straight away on a decent amount of ammo and a couple of Med packs. Don't worry, the game isn't stingy in giving out credits, as a lot of stuff is superficial and easily sold at the Store. Pick up everything that shines as it might be a collectible or ammo you can sell. You will need to buy and collect Nodes to upgrade your weapons, so you might as well start picking them up now. Check and sweep every area before moving on. Nodes can easily be missed as they don't shine, and are sometimes attached to a back wall or in a dark area. Open up every locker and those crates with a green glow light on top, you can break them open using RB.
This achievement, and every other level complete achievement, will unlock once you have entered the tram and saved.
Lab Rat - 20 points
Complete Chapter 2 on any difficulty setting
See "Dead On Arrival" achievement above.
All Systems Go - 20 points
Complete Chapter 3 on any difficulty setting
See "Dead On Arrival" achievement above.
Cannon Fodder - 20 points
Complete Chapter 4 on any difficulty setting
See "Dead On Arrival" achievement above.
True Believer - 20 points
Complete Chapter 5 on any difficulty setting
See "Dead On Arrival" achievement above.
Greenhouse Effect - 20 points
Complete Chapter 6 on any difficulty setting
See "Dead On Arrival" achievement above.
S.O.S. - 20 points
Complete Chapter 7 on any difficulty setting
See "Dead On Arrival" achievement above.
Strange Transmissions - 20 points
Complete Chapter 8 on any difficulty setting
See "Dead On Arrival" achievement above.
Wreckage - 20 points
Complete Chapter 9 on any difficulty setting
See "Dead On Arrival" achievement above.
Keeper of the Faith - 20 points
Complete Chapter 10 on any difficulty setting
See "Dead On Arrival" achievement above.
Betrayed - 20 points
Complete Chapter 11 on any difficulty setting
See "Dead On Arrival" achievement above.
Exodus - 20 points
Complete Chapter 12 on any difficulty setting
See "Dead On Arrival" achievement above.
Epic Tier 3 Engineer - 150 points
Complete the game on the hardest difficulty setting
You will need to beat the game on ANY difficulty to unlock the Impossible mode. As it says, it is almost "impossible" and very hard. I tried it and my controller was visiting the wall a few times. Use the cheats if you want to attempt this, unless you are hardcore. Just as a note for those wanting to do this, SAVE your game straight away once you START on Impossible mode. Otherwise you will lose it and you will need to replay the whole game to unlock Impossible mode again.
Survivor - 50 points
Complete the game on any difficulty setting
Just beat the game on any setting to unlock this.
Pack Rat - 10 points
Store 25 Items in the Safe
Easy. As soon as you have reached about 20 - 25,000 credits (use the cheats if you want) then save your game. Go to a Store and buy a bunch of air cans or cheap med packs and dump them into the Safe. You need to off load 25 items into the safe. Once the achievement unlocks, quit your game and reload the save.
Story Teller - 20 points
Collect 75 Logs
This sounds a lot, but it is not. These include text, audio and all story video and radio messages you receive. Always look for shiny blinking things and pick them up. There are 168 in total, but you will only need 150, so you could miss quite a few and it will still unlock.
Legend Teller - 40 points
Collect 150 Logs
See "Story Teller" achievement above.
Full Arsenal - 30 points
Own every Weapon in the game
As soon as a weapon is available, buy it. You will need them for the weapon achievements anyway. You will need about 55,000 credits to buy them all. Here is the list.
Plasma Cutter
Flamethrower
Ripper
Line Gun
Pulse Rifle
Force Gun
Contact Beam
Z-Baller - 5 points
Complete Level 6 in Zero-G Basketball
On Level 10, you will pick up a Nav Card and arrive at a Zero G basketball court. You will need to beat or level the highest score to move to the next level. To score, grab the ball with Kinesis and shoot it into the lighted ring. There are several platforms to jump to all around, but to honest I found this achievement a little time consuming for 5 points. Beating each level however unlocks several rewards.
Merchant - 10 points
Collect 8 schematics
Schematics have a blue glow. They are blueprints and allow you to buy weapons and suit upgrades. There are loads so you should pick up eight pretty easy.
Armstrong - 10 points
Shoot 50 objects using Kinesis
As soon as you pick up the Kinesis ability, clear an area, then pick any object. Hold LT and aim at the object then press B (Kinesis) to grab it. Click RT to shoot it across the room. Do this 50 times.
Marksman - 5 points
Dismember 20 Limbs
Use Stasis to slow down any enemy, then aim and blow off their arms and legs. Once they are dead, go over to their body and press RB to curb stomp any limbs you missed. Should get 1000 easy in one play through.
Surgeon - 20 points
Dismember 500 Limbs
See "Marksman" achievement above.
Butcher - 40 points
Dismember 1000 Limbs
See "Marksman" achievement above.
Freeze - 15 points
Use Stasis on 50 enemies
If you are using the cheats, then there shouldn't be a problem using your reserves. Just use LT to aim then press X to launch Stasis, on every enemy and you should get it in no time.
Crackshot - 5 points
Achieve a perfect score in the Shooting Gallery
When you get to Level 9 you will come across a shooting gallery. Don't worry you get infinite ammo here (why here and nowhere else, I don't know). The aim is to shoot all the red targets and spare the blue ones. If you a having trouble, try spraying with the Pulse gun or use the Plasma Cutter in vertical mode. It is worth doing all the levels as you get a Ruby Semiconductor and Power Node.
Air Alert - 10 points
Zero-G Jump over 100 times
You will hear a voice over whenever you have entered a Zero G room. The first Zero G room you will come across, is in Level 2. This would be the best time to do this achievement as there are no enemies around. Press LT to aim and Y to jump. Just bounce from wall to wall and you will get 100 pretty easily. If you are doing this in later levels, use the oxygen cheat if the room has no oxygen, to make it easier.
One Gun - 40 points
Beat the game using only the Plasma Cutter
Annoying achievement alert. This is the first weapon you obtain and some people think it is best in the game. I would fully upgrade the weapon first, before attempting this. Stock up on a lot of ammo and some med packs and get rid of anything else to free up your slots. Because you don't want to run out of ammo, especially during a boss fight.
This can be annoying because some enemies (notably those monsters attached to wall spitting foetuses) take a lot of ammo.
Brawler - 10 points
Kill at least 30 enemies with a melee attack
Shoot off the limbs, then when the enemy are crawling (make sure they are still alive), hit RB to melee them dead.
Maxed Out - 75 points
Upgrade all weapons and equipment
Realistically you will need a second play through on the same save to get this. You will need over 150 Power Nodes to fully upgrade all your weapons and Stasis and Kinesis, So yeah, that is a lot. DO NOT SELL any of your weapons or you will lose your upgrades!! I managed to unlock this near the beginning of Level 11 on second play through and I was playing conservatively, so I would say it is possible to get it earlier.
Be sure to watch the credits at the end of the first play through as you will be rewarded with 50,000 credits and 10 Power Nodes. On second play through, stick to one or two guns and sell any ammo you find you don't need. Use the cheats so you can sell any Stasis or Oxygen packs you find. You can also buy Nodes at the Store for 10,000 credits.
You need to go to a Work Bench to upgrade. When you are upgrading, you do not have to fill in every slot with a Node. You can sometimes work around them and miss some empty slots. During the second play through you will get a chance to upgrade to a Level 6 Military suit. Unfortunately it is 99,000 credits so it is a toss up between Nodes or more slots to carry stuff. Personally I bought the suit.
Note also on Level 11, there is an Easter egg item worth 30,000 credits. This is what I used to get my last three Nodes. See "There is Always Peng!" achievement below.
Ragdoll Check - 5 points
Force an enemy into a Gravity Panel 5 times
During Level 4, you will reach a room where there are gravity floor panels missing. To knock an enemy into one, just Stasis them and then just gently walk into them into and knock them with your body. Careful not to go into one yourself or you will also be sucked up. Do this five times to unlock.
Big Spender - 10 points
Spend 300,000 credits at the store
Easily done while playing on the first play through, so don't worry about it too much. This figure is accumulative over the game, so there's no necessity save it all up. You easily spend 300,000 credits.
Full Contact - 10 points
Kill 30 enemies with the Contact Beam
With all these weapon achievements, stock up on ammo and just use that weapon exclusively for a while. Getting 30 kills is not that hard. I managed to get all these on the first play through.
A Cut Above - 10 points
Kill 30 enemies with the Ripper
See "Full Contact" achievement above.
Tool Time - 10 points
Kill 30 enemies with the Plasma Cutter
See "Full Contact" achievement above.
Pusher - 10 points
Kill 30 enemies with the Force Gun
See "Full Contact" achievement above.
Live With The Hot Ones - 10 points
Kill 30 enemies with the Flamethrower
See "Full Contact" achievement above.
Autofire - 10 points
Kill 30 enemies with the Pulse Rifle
See "Full Contact" achievement above.
Eviscerator - 10 points
Kill 30 enemies with the Line Gun
See "Full Contact" achievement above.
There's Always Peng! - 15 points
Find the Peng Treasure
This is an Easter egg and is worth 30,000 credits. You will find it in Level 11. When you leave the Flight Lounge area, go through the door marked Runway One. (Actually this is the runway where you started the game) Walk up the runway and look to your right into the trough between Runway One and Runway Two. It looks like a little doll. You will need Kinesis to pick it up.
Here's a Rooster Teeth YouTube video that will show where to get it. It will also show Crackshot and Z-Baller achievements.
Exterminator - 15 points
Kill the Leviathan
This is the boss at the end of Level 6. He is huge, but don't let that fool you, as he is very easy. Be sure to bring plenty of ammo. There will tentacles (three I think) at first that shoot out and try to strike you. Just blow the yellow bits to kill them.
Once you have killed them, it will start shooting glowing rocks at you from it's mouth in the middle. Use Kinesis to send the first few back to unlock "Playing Catch" achievement. Then start shooting at the rocks BEFORE they leave it's mouth. This will make them explode in it's mouth and do tremendous damage and you will kill it easy. Kind of an anti-climax really.
Brute Force - 15 points
Kill a Brute
The first time you encounter one of these mini-bosses is in Level 4. The voice over tells you to shoot them in the back, but the easiest I found was to Stasis it, then pump a ton of Pulse gun bullets and blow off it's arms and legs, and it is over in a minute.
Mindless Prey - 30 points
Kill the Hive Mind
Another boss that looks huge and menacing but quite easy. This will be the last boss in the game. Make sure you have plenty of ammo before you start. When the fight begins, just keep moving a lot from side to side. You first need to shoot out the five yellow things on it's body. Then when that's done shoot the ones in it's rib cage when it opens. Job done. If by chance you get caught on it's tentacles, all is not lost. Just keeping shooting at the yellow things and it will eventually drop you again.
Playing Catch - 10 points
Catch a Brute or Leviathan Pod using Kinesis
See "Exterminator" achievement above.
Don't get cocky, kid - 10 points
Survive the ADS Cannon with over 50% shield strength remaining
Annoying achievement alert number two. You get the ADS cannon near the end of Level 4. Save at the nearby save point before attempting this so can reload the save if you mess up. This is one of the hardest, if not the hardest achievement in the game. The amount of times I finished on 49% was ridiculous. The sequence changes each time, so it is hard to work out a strategy.
Most people have said just to concentrate on the large and fast rocks and press the two triggers at the same time for more damage.
Kickin it - 10 points
Escape from a Lurker's grab attack 10 times
Lurkers are small and stumpy and have a three tentacles sticking out. When you see one, don't shoot it. Instead let it jump on you and it will try and stab you in your neck and back. As soon as it does, pump your A button to get rid of it. Do this 10 times for the achievement to unlock.
Slugger - 10 points
Kill the Slug Boss with more than 50% shield strength remaining
You will encounter the Slug Boss at the end of Level 8. Again save at the nearby save point before attempting this so can reload the save if you mess up. Luckily, this is not half as bad as "Don't get cocky, kid" achievement. As soon as you get on the gun, start shooting the yellow things on it's tentacles. Concentrate on one tentacle at first, then move onto the others. Once you have blown about three, it is a easy kill then and just take your time not letting the shield drop below 50%. Make sure you shoot at the tentacles while it is holding a canister, as this does tremendous damage.
This game has cheats that DO NOT AFFECT ACHIEVEMENTS.
CHEATS
Pause the game then enter one of the following codes. When you entered the code correctly, you will hear a buzz sound. Note: Credit and Node codes can only be enabled once per game.