Apprentice (75 points): Complete Game - Apprentice difficulty. Do not change the difficulty after the game has started.
Sith Warrior (100 points): Complete Game - Sith Warrior difficulty. Do not change the difficulty after the game has started.
Sith Lord (100 points): Complete Game - Sith Lord difficulty. Do not change the difficulty after the game has started.
Sith Master (100 points): Complete Game - Sith Master difficulty. Do not change the difficulty after the game has started.
Pushed (5 points): Defeat 100 enemies with Force Push.
Gripped (5 points): Defeat 100 enemies with Force Grip.
Shocked (5 points): Defeat 100 enemies with Force Lightning.
Repulsed (5 points): Defeat 100 enemies with Force Repulse.
Impaled (5 points): Defeat 100 enemies with Saber Throw.
Stormed (5 points): Defeat 100 enemies with Lightning Shield.
Grappled (15 points): Defeat 100 enemies with a grapple move.
Launched (20 points): Defeat 100 enemies with Aerial Ambush juggle combos.
PROXY Won"t Be Happy (15 points): Destroy 35 droids.
Rebel Leader (15 points): Defeat 500 Imperials.
Bossk (15 points): Defeat 200 Wookiees on Kashyyyk Prologue.
Bully (15 points): Defeat 25 Ugnaughts or Jawas.
Skilled (5 points): Earn 250,000 Force Points on a single level.
Expert (10 points): Earn 500,000 Force Points on a single level.
Legend (25 points): Earn 600,000 Force Points on a single level.
Frenzy (5 points): Get a Frenzy x4 bonus.
Sith Frenzy (10 points): Get a Frenzy x8 bonus.
Sith Lord Frenzy (15 points): Get a Frenzy x12 bonus.
Holocron Collector (75 points): Collect all Jedi holocrons in the game.
Corellian Star (10 points): Complete all bonus objectives on one level.
Force Push Mastery (20 points): Defeat 500 enemies with Force Push.
Force Grip Mastery (20 points): Defeat 500 enemies with Force Grip.
Force Lightning Mastery (20 points): Defeat 500 enemies with Force Lightning.
Force Repulse Mastery (20 points): Defeat 500 enemies with Repulse.
Lightsaber Throw Mastery (20 points): Defeat 500 enemies with Saber Throw.
Lightning Shield Mastery (20 points): Defeat 500 enemies with Lightning Shield.
The Bigger They Are (15 points): Defeat 6 Rancors.
The Harder They Fall (15 points): Defeat 10 AT-STs or AT-KTs.
Cannon Fodder (15 points): Defeat 150 Stormtroopers.
Sith Trials (20 points): Complete all Training Room challenges and Combat Modules.
Sith Training (20 points): Complete all Training Room lessons.
Additionally, there are twelve secret achievements:

Invasion (10 points): Complete Level - Prologue.
Insurrection (10 points): Complete Level - TIE Factory, act 1.
Junkyard (10 points): Complete Level - Raxus Prime, act 1.
Jedi Hunt (10 points): Complete Level - Felucia, act 1.
Empirical (10 points): Complete Level - Empirical, act 2.
Vapor Room (10 points): Complete Level - Cloud City, act 2.
Skyhook (10 points): Complete Level - Kashyyyk, act 2.
Infestation (10 points): Complete Level - Felucia, act 2.
Destroyer (10 points): Complete Level - Raxus Prime, act 2.
Redemption (20 points): Complete Game - Light Side.
Revenge (20 points): Complete Game - Dark Side.
Worst Day-Shift Manager Ever (10 points): Kill 12 Stormtroopers as Vader during the Prologue.
The following achievements require the bonus "Jedi Temple" downloadable content:

As the World Turns (30 points): Use the large globe to kill 10 enemies in the museum.
Get A Grip (30 points): Defeat the trials without the sphere turning red.
Jedi Knight (30 points): Complete Jedi Temple - Sith Lord Difficulty.
Jedi Master (40 points): Complete Jedi Temple - Sith Master Difficulty.
Padawan (30 points): Complete Jedi Temple - Sith Warrior Difficulty.
Robot Parts (30 points): Defeat the training room in less than 2 minutes.
Youngling (30 points): Complete Jedi Temple - Appretice Difficulty.