Unlockables
Achievements (MAJOR SPOILERS WITHIN)
Complete each achievement to get the allotted gamerscore.

Unlockable:                       How to Unlock:
Completed Welcome (10)            Successfully complete the Welcome 
                                  To Rapture Level.
Maxed One Track (20)              Purchased every slot in one of the 
                                  Plasmid or Tonic tracks.
Maxed All Tracks (50)             Purchased every slot in all four 
                                  Plasmid and Tonic tracks.
Bought One Slot (5)               Purchase one slot in any Plasmid or 
                                  Tonic track.
Upgraded a Weapon (5)             Acquire at least one weapon upgrade.
One Fully Upgraded Weapon (5)     Fully upgrade one weapon.
Two Fully Upgraded Weapons (5)    Fully upgrade two weapons.
Three Fully Upgraded Weapons (10) Fully upgrade three weapons.
Four Fully Upgraded Weapons (10)  Fully upgrade four weapons.
Five Fully Upgraded Weapons (10)  Fully upgrade five weapons.
Weapon Specialist (20)            Acquire all upgrades for all weapons.
Fully Researched Thug Splicer (10) Fully research the Thuggish Splicer.
Fully Researched Gun Splicer (10)  Fully research the Leadhead Splicer.
Fully Researched Spider Splicer (10) Fully research the Spider Splicer.
Fully Researched Houdini Splicer (10) Fully research the Houdini 
                                  Splicer.
Fully Researched Nitro Splicer (10) Fully research the Nitro Splicer.
Fully Researched Rosie (10)       Fully research the Rosie.
Fully Researched Bouncer (10)     Fully research the Bouncer.
Fully Researched Little Sister (10) Fully research the Little Sister.
Prolific Photographer (5)         Take at least one photo in every 
                                  research group.
Research PhD (20)                 Max out all possible research.
Quality Research Photo (20)       Take a Research Photo of the 
                                  highest grade.
Researched a Splicer (5)          Take at least one Research 
                                  Photo of a Splicer.
One Successful Hack (5)           Perform at least one successful hack.
Hacked a Security Bot (10)        Successfully hack a security bot.
Hacked a Security Camera (10)     Successfully hack a security camera.
Hacked a Turret (10)              Successfully hack a turret.
Hacked a Vending Machine (10)     Successfully hack a vending machine.
Hacked a Safe (10)                Successfully hack a safe.
Skilled Hacker (40)               Successfully complete 50 hacks.
Basic Inventor (5)                Successfully invent at least 
                                  one item.
Avid Inventor (10)                Successfully invent at least 
                                  100 items.
Ammo Inventor (25)                Successfully invented all possible 
                                  ammo types.
Little Sister Savior (100)        Complete the game without harvesting 
                                  any Little Sisters.
Tonic Collector (50)              Collect or Invent 53 Tonics in the 
                                  Physical, Engineering and 
                                  Combat tracks.
Historian (50)                    Find every audio diary.
Seriously Good At This (40)       Complete the game on the hardest 
                                  difficulty setting.
Dealt with every Little Sister (40) Either Harvest or Rescue every 
                                  Little Sister in the game.
Lucky Winner (10)                 Hit the jackpot at a slot machine.
Toaster in the Tub (10)           Shock an enemy in the water.
Defeated Dr. Steinman (15)        The player has defeated 
                                  the crazed Dr. Steinman.
Defeated Peach Wilkins (15)       The player has defeated Peach 
                                  Wilkins.
Irony (10)                        The player has taken a picture of 
                                  Sander Cohen's corpse.
Became a Big Daddy (30)           The player has become a Big Daddy.
Defeated Atlas (100)              The player has defeated Atlas.
Broke Fontaine's Mind Control (30) The player has broken 
                                  Fontaine's mind control.
Defeated Andrew Ryan (30)         The player has defeated Andrew 
                                  Ryan.
Completed Cohen's Masterpiece (30) The player has completed 
                                  Sander Cohen's great masterpiece.
Restored the Forest (15)          The player has restored 
                                  the forests of Arcadia.
Found Cohen's Room (10)           The player has entered 
                                  Sander Cohen's personal quarters.