Just over two years after BioWare’s original space-RPG epic hit the Xbox 360, its much-anticipated sequel has finally arrived. A much darker, more serious affair than the first title, Mass Effect 2 is a western-RPG with so many paths through the game, you’ll need a walkthrough just to comprehend it all. And that’s where we come in. Our gigantic walkthrough is rounded out by a robust basics section, coverage on all side quests, and even the game’s entire codex, for all of you nerds out there.

It’s time to save the galaxy!… again.

Mass Effect 2 Achievement Guide

Missing in Action (5)
Save your crew from an overwhelming attack

Very Elusive (10)
Return to active duty

The Convict (10)
Successfully recruit the biotic Convict

The Krogan (10)
Successfully recruit the krogan

The Archangel (10)
Successfully recruit Archangel

The Professor (10)
Successfully recruit the Professor

The Quarian (10)
Successfully recruit the quarian

The Justicar (10)
Successfully recruit the Justicar

The Assassin (10)
Successfully recruit the Assassin

Friend or Foe (10)
Obtain geth technology

Colony Defense (25)
Defend a human colony from attack

The Prodigal (10)
Gain the loyalty of the Cerberus Officer

Ghost of the Father (10)
Gain the loyalty of the Cerberus Operative

Catharsis (10)
Gain the loyalty of the biotic Convict

Battlemaster (10)
Gain the loyalty of the krogan

Fade Away (10)
Gain the loyalty of Archangel

The Cure (10)
Gain the loyalty of the Professor

Treason (10)
Gain the loyalty of the quarian

Doppelganger (10)
Help the Justicar resolve her mission

Cat’s in the Cradle (10)
Gain the loyalty of the Assassin

A House Divided (10)
Hack a geth collective

Ghost Ship (25)
Complete the investigation of a derelict alien vessel

Suicide Mission (50)
Use the Omega 4 Relay

Mission Accomplished (125)
Save humanity throughout the galaxy from certain annihilation

Against All Odds (15)
Survive suicide mission

Insanity (75)
Complete the game on the “Insanity” difficulty level without changing the setting

No One Left Behind (75)
Keep your team alive through the suicide mission

Long Service Medal (75)
Complete Mass Effect 2 twice, or complete it once with a character imported from Mass Effect 1

Paramour (50)
Successfully pursue a relationship with a teammate

Head Hunter (10)
Perform 30 headshot kills with any weapon on humanoid targets

Brawler (10)
Shoot and kill 20 enemies while they’re knocked back by a punch

Big Game Hunter (10)
Thresher Maw defeated

Tactician (10)
Hit 20 different targets with multiple biotic powers to combine the effects

Master at Arms (15)
Kill enemies with 5 different heavy weapons during the game

Merciless (10)
Make 20 enemies scream as they fall or are set on fire

Overload Specialist (15)
Disrupt the shields of 25 enemies

Warp Specialist (15)
Warp the barriers of 25 enemies

Incineration Specialist (15)
Incinerate the armor of 25 enemies

Operative (15)
Complete a mission discovered by scanning an unexplored world

Agent (50)
Complete 5 missions discovered by scanning unexplored worlds

Prospector (5)
Retrieve mineral resources by scanning and probing a planet in the galaxy map

Explorer (10)
Visit 100 percent of the planets in an unexplored cluster

Power Gamer (10)
Reach Level 30 with one character

Scholar (15)
Unlock 15 new Mass Effect 2 codex entries

Technician (15)
Obtain (10) technology upgrades

Weapon Specialist (15)
Fully upgrade a weapon

Scientist (10)
Complete any research project in the Normandy’s laboratory

Fashionista (5)
Personalize your armor in your quarters on the Normandy

Power Full (15)
Evolve any power

Highly Trained (15)
View all advanced combat training videos at Shepard’s private terminal.

BioShock 2 is a survival horror first-person shooter video game, being developed by 2K for the PlayStation 3 and Xbox 360 video game consoles. It is the sequel to the critically-acclaimed 2007 video game BioShock. The game is scheduled for simultaneous release on February 9, 2010 for all platforms.

The game is set in fictional dystopian city Rapture in alternative history 1970, a decade after the events of BioShock. The protagonist and player-controlled character is a Big Daddy, a being who has had its organs and skin grafted into an atmospheric diving suit. When it becomes obvious that Rapture’s leader Sofia Lamb will become responsible for the city’s destruction, the Big Daddy attempts to overthrow Lamb and her army of Big Sisters.

Bioshock 2 Achievement Guide

Bought a Slot (5 points)
Buy one Plasmid or Tonic Slot at a Gatherer’s Garden.

Max Plasmid Slots (10 points)
Fully upgrade to the maximum number of Plasmid Slots.

Upgraded a Weapon (10 points)
Upgrade any weapon at a Power to the People Station.

Fully Upgraded a Weapon (10 points)
Install the third and final upgrade to any of your weapons.

All Weapon Upgrades (20 points)
Find all 14 Power to the People weapon upgrades in the game.

Prolific Hacker (20 points)
Successfully hack at least one of every type of machine.

Master Hacker (20 points)
Hack 30 machines at a distance with the Hack Tool.

First Research (5 points)
Research a Splicer with the Research Camera.

One Research Track (20 points)
Max out one Research Track.

Research Master (20 points)
Max out research on all 9 research subjects.

Grand Daddy (25 points)
Defeat 3 Big Daddies without dying during the fight.

Master Gatherer (30 points)
Gather 600 ADAM with Little Sisters.

Fully Upgraded a Plasmid (10 points)
Fully upgrade one of your Plasmids to the level 3 version at a Gatherer’s Garden.

All Plasmids (20 points)
Find or purchase all 11 basic Plasmid types.

Trap Master (15 points)
Kill 30 enemies using only Traps.

Master Protector (15 points)
Get through a Gather with no damage and no one getting to the Little Sister.

Big Spender (15 points)
Spend 2000 dollars at Vending Machines.

Dealt with Every Little Sister (50 points)
Either Harvest or Save every Little Sister in the game.

Against All Odds (30 points)
Finish the game on the hardest difficulty level.

Big Brass Balls (25 points)
Finish the game without using Vita-Chambers.

Rapture Historian (40 points)
Find 100 audio diaries.

Unnatural Selection (10 points)
Score your first kill in a non-private match.

Welcome to Rapture (10 points)
Complete your first non-private match.

Disgusting Frankenstein (10 points)
Become a Big Daddy for the first time in a non-private match.

“Mr. Bubbles– No!” (20 points)
Take down your first Big Daddy in a non-private match.

Mother Goose (20 points)
Save your first Little Sister in a non-private match.

Two-Bit Heroics (10 points)
Complete your first trial in a non-private match.

Parasite (10 points)
Achieve Rank 10.

Little Moth (20 points)
Achieve Rank 20.

Skin Job (20 points)
Achieve Rank 30.

Choose the Impossible (50 points)
Achieve Rank 40.

Proving Grounds (20 points)
Win your first non-private match.

Man About Town (10 points)
Play at least one non-private match on each multiplayer map.

Secret Achievements

Daddy’s Home (10 points)
Found your way back into the ruins of Rapture.

Protector (20 points)
Defended yourself against Lamb’s assault in the train station.

Sinclair’s Solution 20 points
Joined forces with Sinclair in Ryan Amusements.

Confronted Grace (10 points)
Confronted Lamb’s lieutenant in Pauper’s Drop.

Defeated the Preacher (20 points)
Defeated the Preacher.

Nose for News (20 points)
Uncovered the secret of Dionysus Park.

Found Lamb’s Hideout (20 points)
Gained access to Lamb’s stronghold.

Reunion (50 points)
Reunited with your original Little Sister.

Heading to the Surface (25 points)
Headed to the surface on the side of Sinclair’s escape pod.

Escape (100 points)
Escaped Rapture.

9-Irony (5 points)
Paid your respects to the founder of Rapture.

Distance Hacker (5 points)
Used the Hack Tool to hack an object at a distance.

Unbreakable (20 points)
Defended yourself against the Big Sister without dying.

Look at You, Hacker (15 points)
Killed 50 enemies using only hacked Security.

Adopted a Little Sister (5 points)
Adopted a new Little Sister for the first time.

Savior (25 points)
Saved every Little Sister and spared Grace, Stanley and Gil.

Counterattack (5 points)
Killed an enemy with its own projectile.

The Joker, Batman’s nemesis, has instigated an elaborate plot from within Arkham Asylum where many of Batman’s other villains have been incarcerated. Batman investigates and comes to learn that the Joker is trying to create an army of Bane-like creatures that threaten Gotham City, and is forced to put a stop to the Joker’s plans.