BioShock

Complete the following achievements to unlock XboxLive Gamerscore points.

Completed Welcome (10 points): Successfully complete the Welcome To Rapture Level.

Maxed One Track (20 points): Purchased every slot in one of the Plasmid or Tonic tracks.

Maxed All Tracks (50 points): Purchased every slot in all four Plasmid and Tonic tracks.

Bought One Slot (5 points): Purchase one slot in any Plasmid or Tonic track.

Upgraded a Weapon (5 points): Acquire at least one weapon upgrade.

One Fully Upgraded Weapon (5 points): Fully upgrade one weapon.

Two Fully Upgraded Weapons (5 points): Fully upgrade two weapons.

Three Fully Upgraded Weapons (10 points): Fully upgrade three weapons.

Four Fully Upgraded Weapons (10 points): Fully upgrade four weapons.

Five Fully Upgraded Weapons (10 points): Fully upgrade five weapons.

Weapon Specialist (20 points): Acquire all upgrades for all weapons.

Fully Researched Thug Splicer (10 points): Fully research the Thuggish Splicer.

Fully Researched Gun Splicer (10 points): Fully research the Leadhead Splicer.

Fully Researched Spider Splicer (10 points): Fully research the Spider Splicer.

Fully Researched Houdini Splicer (10 points): Fully research the Houdini Splicer.

Fully Researched Nitro Splicer (10 points): Fully research the Nitro Splicer.

Fully Researched Rosie (10 points): Fully research the Rosie.

Fully Researched Bouncer (10 points): Fully research the Bouncer.

Fully Researched Little Sister (10 points): Fully research the Little Sister.

Prolific Photographer (5 points): Take at least one photo in every research group.

Research PhD (20 points): Max out all possible research.

Quality Research Photo (5 points): Take a Research Photo of the highest grade.

Researched a Splicer (5 points): Take at least one Research Photo of a Splicer.

One Successful Hack (5 points): Perform at least one successful hack.

Hacked a Security Bot (10 points): Successfully hack a security bot.

Hacked a Security Camera (10 points): Successfully hack a security camera.

Hacked a Turret (10 points): Successfully hack a turret.

Hacked a Vending Machine (10 points): Successfully hack a vending machine.

Hacked a Safe (10 points): Successfully hack a safe.

Skilled Hacker (40 points): Successfully complete 50 hacks.

Basic Inventor (5 points): Successfully invent at least one item.

Avid Inventor (10 points): Successfully invent at least 100 items.

Ammo Inventor (25 points): Successfully invented all possible ammo types.

Little Sister Savior (100 points): Complete the game without harvesting any Little Sisters.

Tonic Collector (50 points): Collect or Invent 53 Tonics in the Physical, Engineering and Combat tracks.

Historian (50 points): Find every audio diary.

Seriously Good At This (40 points): Complete the game on the hardest difficulty setting.

Dealt with every Little Sister (40 points): Either Harvest or Rescue every Little Sister in the game.

Lucky Winner (10 points): Hit the jackpot at a slot machine.

Toaster in the Tub (10 points): Shock an enemy in the water.

There are also ten secret achievements.
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Complete the following achievements to unlock Xbox Live Gamerscore points.

Depending on how you deal with the Little Sisters throughout the game, you will get a different ending.

There are three possible endings, depending on how the Little Sisters were treated.

If more than one Little Sister was harvested, the "bad" ending will play.
If no more than one Little Sister was harvested, but the rest were rescued, the "good" ending will play.
Rescue all the Little Sisters in the game except for one that is harvested to see the third ending.

In certain areas there will be 2 Big Daddy's at one time, one will have a Little Sister and one won't.

1. Use the hypnotize Big Daddy Plasmid on the one that does not have a Little Sister.
2. Attack the Big Daddy with the Little Sister and the other Big Daddy will start to protect you by attacking.
3. Watch the health of both Big Daddy's and when they get close to dying start using your frag grenades to finish both of them off.

The key to Chompers Dental in the Medical Pavilion is acquired by using Telekinesis through the broken window to the left of the door. There should be a corpse hanging over the broken window. The key should be grabbed with Telekinesis because it is hanging on a wall on the other side of the window. You can get Telekinesis in an area near here. You will need to get that first, but do not follow the arrow back to the rubble that you need to get rid of until you explore Chompers Dental. There is a safe and other good items to be found inside. Note that both Telekinesis and Chompers Dental are near where you find the shotgun.

This works when you have an upgraded Crossbow and Upgraded Electro-Bolt. I haven't tried with the simplest versions, but I assume it will just take more Crossbow Bolts.

When you have The Electro-Bolt Plasmid equipped, and the Crossbow with the TRAP BOLT, you can easily use this strategy to kill a Big Daddy. When you encounter a Big Daddy, it's best to be in a place where you can move around.

First you fire a Trap Bolt and start backing up cause it comes at you fast. Immediately after you fire, you switch to Electro-Bolt and zap it, then immediately switch back to the crossbow.
If your Plasmid is strong enough, he shouldn't have enough time to recover before you shoot him again. Keep moving, though, cause sometimes he may get a running start before you stun him again.

It took me one clip of a crossbow, but it will be different for everybody. You may have to take a hit, but it's the fastest way to take the Big Daddy down.

This is the final Boss and he has three different styles of attacks:. Flame Plasmid Form, Ice Plasmid Form, and Electric Plasmid Form. The easiest way to defeat him in the first part is to use your Ice Plasmid and freeze him. Then, switch to your Telekinesis Plasmid. Grab an explosive tank and throw it at him. Also, if desired, just use your telekinesis. He is very predictable if you are far away from him. Wait for him to throw a fire ball at you then move out of the way. He will continue to run past you. Use this chance to fire the machine gun, which does the most damage to him. Once he goes back to his chamber to gain his life back, change to the Flame Plasmid and get ready for some bots. Once he starts his routine of fire and run, blast again him with the Flame Plasmid . The more you blast him, the faster he loses life. Continue to use the machine gun while he is aflame. He will now go back to his chamber one last time. He now has electrical powers. Keep your Flame Plasmid ready. This time, shoot him with the Flame Plasmid and he will run for the water. Once he jumps in the water and comes back out, hit him with it again. Be aware that there are splicers all over as well. Also set them ablaze to get some extra life. There are many different ways to defeat him but this seemed to be the easiest.

The easiest way to defeat Atlas is to make sure that you have the fully upgraded shotgun and the Decoy ability. After you drain his Adam, drop a decoy and while Atlas is attacking it, use the shot gun. After you have used all four rounds immediately cast Decoy again, reload your shotgun, then begin shooting him again. Repeat this until you have to drain his Adam. Once again, reload your shotgun and Plasmids before you drain his Adam. Then start over using Decoy and the shotgun. Use Health Packs as needed and ignore any Splicers in the area, as they will be paying attention to your Decoy just like Atlas.

Once you have obtained the crossbow and at least five Trap Bolts, it will be very easy to take down a Big Daddy. Face a wall and stand about three feet away. Make sure it is not something that the bolts can bounce off of, and also make sure you have a nice ten foot long straight wall. Once you are better skilled at this technique, you can try for shorter lengths if desired. Point straight ahead and fire out a bolt. Take about two steps to the left or right, depending on which way the Bid Daddy is, and at your location, and fire another. Fire all five bolts out, then shoot the Big Daddy once with anything. If done correctly, it will run through the line of traps, taking enough health down so he can be killed with a few shots of your weapon of choice. Note: This may not work in an open area because Big Daddies strafe frequently. If you have the damage increase for the crossbow, it will only take three or four bolts to kill him. Do not crouch while setting up the traps. If the Big Daddy walks another way and gets out of sight, you may need to go back to get him. If you do get him, you can crouch under the set traps. An easy way to trigger bolt traps is to pick up something with Telekinesis and drag the object through it

Get your shotgun fully upgraded (power to the people stations, rate of fire, and damage upgrades), then just use your old 00 buck. After you have killed them, you can get the Little Sister and all the money they had on them. This can result to no to to very little damage from Big Daddies. Aim for the head to cause more damage. Note: This was done under the Easy difficulty setting.

After you have acquired the Security Bullseye Plasmid, set off an alarm either by hacking or being spotted by a security camera. Then, throw the Security Bullseye at the Big Daddy. You may have to do this twice depending on how much health the Big Daddy has when starting out. Try to avoid the battle because the crossfire and exploding bots will damage your health. The only problem with this technique is that once the Big Daddy is taken down, the bots will come after you. Be prepared to either run and hide, or fight them off.