Mass Effect Cheat Codes PC

Mass Effect for the PC is now available. The cheat codes seem to be limited, however the walkthrough below gives you everything you need to successfully complete the game.

SECTION 1: Prologue


1 - Shakedown
Our story begins as you head to the front of the Normandy, where Joker--the
ship's helmsman--has just finished a mass relay jump.  The mass relays are
relics of an ancient civilization known as the Protheans, and allow rapid
travel throughout the galaxy.  He relays his success to Nihlus Kryik, who is
overseeing the operation.  Nihlus is a turian Spectre, an elite operative
charged with maintaining galactic stability at any cost.  When Nihlus leaves,
Joker tells Lt. Alenko about his distrust for Spectres, at which point you
have an opportunity to voice an opinion.  Your dialog choices can net you
Paragon or Renegade points.  Choices in the upper part of the dialogue wheel
usually correspond with the Paragon alignment, while choices on the bottom of
the wheel usually correspond to the Renegade alignment.  Captain Anderson
comes on the comm and asks you to report to the briefing room.

   + Paragon for agreeing with Joker
   + Renegade for chastising your crew
   New Mission: "Prologue: On the Normandy"

2 - Pressly (Optional)
On your way back towards the briefing room you can overhear Navigator Pressly
having a conversation with Chief Engineer Adams.  Speaking with Pressly
reveals his concerns about the mission.  He feels that Nihlus and Anderson
are hiding something from the crew.  Pressly can also give you some
information that will get you acquainted with the Normandy's unique stealth
systems.

3 - Jenkins and Chakwas (Optional)
Outside of the briefing room, Corporal Jenkins is having a conversation with
Dr. Chakwas.  You can use this opportunity to learn about both crewmembers. 
They can also tell you more about the Spectres, and Eden Prime, your
destination for this mission.

   + Paragon for being supportive of Jenkins
   + Renegade for telling Jenkins the mission isn't about him

4 - Spectre Training
Enter the briefing room and speak with Nihlus.  He asks about Eden Prime, the
destination for the mission.  Captain Anderson enters and reveals the true
nature of the operation:  A Prothean beacon was unearthed on Eden Prime and
you are being sent in to recover it.  Nihlus will also be using this
opportunity to evaluate you as a possible candidate for the Spectres.  Before
you reach Eden Prime however, Joker patches through a distress signal from
the planet's surface, showing an attack by a massive spaceship of unknown
design.  Needless to say, this complicates the mission, as you must now find
and secure the beacon while helping any survivors you find.

You can find the complete walkthrough at GameFAQs

So enjoy the Mass Effect Cheat Codes/Walkthrough for the PC.