Bioshock 2 - Xbox 360/PC Achievements
 Single Player Achievements
Bought a Slot - 5G
- Bought one Plasmid or Tonic Slot at a Gatherer's Garden.
Fully Upgraded a Weapon - 10G
- Installed the third upgrade to a weapon.
Max Plasmid Slots - 10G
- Fully upgraded to the maximum number of Plasmid Slots.
Upgraded a Weapon - 10G
- Upgraded a weapon at a Power to the People Station.
All Weapon Upgrades - 20G
- Find all 14 Power to the People weapon upgrades in the game.
Prolific Hacker - 20G
- Hacked one of each kind of machine.
Master Hacker - 20G
- Hacked 30 machines at a distance with the Hack Tool.
First Research - 5G
- Researched a Splicer with the Research Camera.
One Research Track - 20G
- Maxed out one Research Track.
Research Master - 20G
- Completed all research on every subject in Rapture.
Grand Daddy - 25G
- Defeated 3 Big Daddies without dying during the fight.
Master Gatherer - 30G
- Gathered 600 ADAM with Little Sisters.
Fully Upgraded a Plasmid - 10G
- Fully upgraded one Plasmid to the Level 3 version.
All Plasmids - 20G
- Found or purchased all 11 basic Plasmid types.
Trap Master - 15G
- Killed 30 enemies using only Traps.
Master Protector - 15G
- Got through a Gather with no damage and no one getting to the Little Sister.
Big Spender - 15G
- Spent 2000 dollars at Vending Machines.
Dealt with Every Little Sister - 50G
- Dealt with every Little Sister.
Big Brass Balls - 25G
- Finished the game without using Vita-Chambers.
Rapture Historian - 40G
- Found 100 audio diaries.
Against All Odds - 30G
- Finished the game on the hardest difficulty level.
 Multiplayer Achievements
Welcome to Rapture - 10G
- Completed your first non-private match.
Unnatural Selection - 10G
- Scored your first kill in a non-private match.
Disgusting Frankenstein - 10G
- Become a Big Daddy for the first time in a non-private match.
"Mr. Bubbles-- No!" - 20G
- Took down your first Big Daddy in a non-private match.
Two-Bit Heroics - 10G
- Completed your first trial in a non-private match.
Mother Goose - 20G
- Saved your first Little Sister in a non-private match.
Parasite - 10G
- Achieved Rank 10.
Little Moth - 20G
- Achieved Rank 20.
Skin Job - 20G
- Achieved Rank 30.
Choose the Impossible - 50G
- Achieved Rank 40.
Proving Grounds - 20G
- Won your first non-private match
Man About Town - 10G
- Played at least one non-private match on each multiplayer map.
(Rapture Metro Pack)
Aqua Incognita - 25G
- Play at least one non-private match on each downloadable content map.
Territorial - 25G
- Win a non-private match in each of the 6 new maps.
Reincarnation - 100G
- Use Rebirth to start again!
(WARNING: SPOILERS BEYOND THIS POINT)
 Secret Achievements
Savior - 25G
- Saved every Little Sister and spared Grace, Stanley and Gil.
Adopted a Little Sister - 5G
- Adopted a new Little Sister for the first time.
Counterattack - 5G
- Kill an enemy with their own projectile.
Distance Hacker - 5G
- Used the Hack Tool to hack an object at a distance.
Unbreakable - 20G
- Defended yourself against a Big Sister without dying.
Look at You, Hacker - 15G
- Killed 50 enemies using only hacked Security.
9-Irony - 5G
- Paid your respects to the founder of Rapture.
Daddy's home - 10G
- Found your way back into the ruins of Rapture.
Protector - 20G
- Defend yourself against Lamb's assault in the train station.
Sinclair's Solution - 20G
- Joined forces with Sinclair in Ryan Amusements.
Confronted Grace - 10G
- Confronted Lamb's lieutenant in Pauper's Drop.
Defeated the Preacher - 20G
- Defeated the Preacher.
Nose for News - 20G
- Uncovered the secret of Dionysus Park.
Found Lamb's Hideout - 20G
- Gained access to Lamb's stronghold.
Reunion - 50G
- Reunited with your original Little Sister.
Heading to the Surface - 25G
- Headed to the surface on the side of Sinclair's escape pod.
Escape - 100G
- Escaped Rapture.