- Man About Town
Played at least one non-private match on each multiplayer map.
26 September 2010 - 4 guides
- Mother Goose
Saved your first Little Sister in a non-private match.
26 September 2010 - 3 guides
- Counterattack
Killed an enemy with its own projectile.
10 July 2010 - 4 guides
- 9-Irony
Paid your respects to the founder of Rapture.
10 June 2010 - 4 guides
- Parasite
Achieved Rank 10.
31 May 2010 - 6 guides
- Proving Grounds
Won your first non-private match.
30 May 2010 - 4 guides
- "Mr. Bubbles-- No!"
Took down your first Big Daddy in a non-private match.
16 April 2010 - 6 guides
- Disgusting Frankenstein
Became a Big Daddy for the first time in a non-private match.
15 April 2010 - 4 guides
- Two-Bit Heroics
Completed your first trial in a non-private match.
26 March 2010 - 3 guides
- Welcome to Rapture
Completed your first non-private match.
15 March 2010 - 3 guides
- Unnatural Selection
Scored your first kill in a non-private match.
15 March 2010 - 4 guides
- Escape
Escaped Rapture.
15 March 2010 - 2 guides
- Heading to the Surface
Headed to the surface on the side of Sinclair's escape pod.
15 March 2010 - 3 guides
- Rapture Historian
Found 100 audio diaries.
15 March 2010 - 5 guides
- Reunion
Reunited with your original Little Sister.
14 March 2010 - 2 guides
- Max Plasmid Slots
Fully upgraded to the maximum number of Plasmid Slots.
14 March 2010 - 4 guides
- Found Lamb's Hideout
Gained access to Lamb’s stronghold.
- Fully Upgraded a Plasmid
Fully upgraded one Plasmid to the Level 3 version.
14 March 2010 - 2 guides
- Trap Master
Killed 30 enemies using only Traps.
14 March 2010 - 9 guides
- Dealt with Every Little Sister
Dealt with every Little Sister.
14 March 2010 - 5 guides
- Nose for News
Uncovered the secret of Dionysus Park.
28 February 2010 - 2 guides
- Look at You, Hacker
Killed 50 enemies using only hacked Security.
28 February 2010 - 3 guides
- One Research Track
Maxed out one Research Track.
28 February 2010 - 3 guides
- Defeated the Preacher
Defeated the Preacher.
18 February 2010 - 2 guides
- Fully Upgraded a Weapon
Installed the third upgrade to a weapon.
18 February 2010 - 2 guides
- Master Hacker
Hacked 30 machines at a distance with the Hack Tool.
18 February 2010 - 2 guides
- Confronted Grace
Confronted Lamb’s lieutenant in Pauper’s Drop.
17 February 2010 - 2 guides
- Big Spender
Spent 2000 dollars at Vending Machines.
17 February 2010 - 2 guides
- Unbreakable
Defended yourself against the Big Sister without dying.
17 February 2010 - 8 guides
- Grand Daddy
Defeated 3 Big Daddies without dying during the fight.
17 February 2010 - 4 guides
- First Research
Researched a Splicer with the Research Camera.
17 February 2010 - 2 guides
- Sinclair’s Solution
Joined forces with Sinclair in Ryan Amusements.
17 February 2010 - 2 guides
- Bought a Slot
Bought one Plasmid or Tonic Slot at a Gatherer's Garden.
17 February 2010 - 4 guides
- Prolific Hacker
Hacked one of each kind of machine.
16 February 2010 - 3 guides
- Adopted a Little Sister
Adopted a new Little Sister for the first time.
16 February 2010 - 4 guides
- Upgraded a Weapon
Upgraded a weapon at a Power to the People Station.
16 February 2010 - 4 guides
- Protector
Defended yourself against Lamb's assault in the train station.
16 February 2010 - 4 guides
- Distance Hacker
Used the Hack Tool to hack an object at a distance.
- Daddy's Home
Found your way back into the ruins of Rapture.
13 February 2010 - 2 guides
- All Weapon Upgrades
Find all 14 Power to the People weapon upgrades in the game.
Locked - 4 guides
- Research Master
Max out research on all 9 research subjects.
Locked - 6 guides
- Master Gatherer
Gather 600 ADAM with Little Sisters.
Locked - 2 guides
- All Plasmids
Find or purchase all 11 basic Plasmid types.
Locked - 2 guides
- Master Protector
Get through a Gather with no damage and no one getting to the Little Sister.
Locked - 19 guides
- Against All Odds
Finish the game on the hardest difficulty level.
Locked - 8 guides
- Savior
Save every Little Sister and choice character.
Locked - 3 guides
- Big Brass Balls
Finish the game without using Vita-Chambers.
Locked - 6 guides
- Little Moth
Achieve Rank 20.
Locked - 4 guides
- Skin Job
Achieve Rank 30.
Locked - 5 guides
- Choose the Impossible
Achieve Rank 40.
Locked - 10 guides