Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Access all areas (20 points): Unlock all Time Trial stretches.
Tango down (15 points): Knock out 20 enemies in melee combat.
Mine! (15 points): Perform 15 successful disarms (outside of the tutorial).
Packrat (80 points): Find all 30 hidden bags.
Back on the job (10 points): Complete the Tutorial.
Prologue Complete (20 points): Complete the Prologue in story mode.
Chapter 1 Complete (20 points): Complete Chapter 1 in story mode.
Chapter 2 Complete (20 points): Complete Chapter 2 in story mode.
Chapter 3 Complete (20 points): Complete Chapter 3 in story mode.
Chapter 4 Complete (20 points): Complete Chapter 4 in story mode.
Chapter 5 Complete (20 points): Complete Chapter 5 in story mode.
Chapter 6 Complete (20 points): Complete Chapter 6 in story mode.
Chapter 7 Complete (20 points): Complete Chapter 7 in story mode.
Chapter 8 Complete (20 points): Complete Chapter 8 in story mode.
That's a wrap (60 points): Complete the story mode on any difficulty.
Bag lady (20 points): Find all three hidden bags in one chapter.
Pro runner (80 points): Complete story mode on hard difficulty.
Ran out of fingers (30 points): Find 11 hidden bags.
On the clock (10 points): Beat the qualifier time on any Time Trial stretch.
Baby steps (20 points): Attain a Time Trial star rating of 20.
A for effort (25 points): Attain a Time Trial star rating of 35.
Still counting (30 points): Attain a Time Trial star rating of 50.
Prologue Speedrun (10 points): Complete a Speedrun of the Prologue below the target time.
Chapter 1 Speedrun (10 points): Complete a Speedrun of Chapter 1 below the target time.
Chapter 2 Speedrun (10 points): Complete a Speedrun of Chapter 2 below the target time.
Chapter 3 Speedrun (10 points): Complete a Speedrun of Chapter 3 below the target time.
Chapter 4 Speedrun (10 points): Complete a Speedrun of Chapter 4 below the target time.
Chapter 5 Speedrun (10 points): Complete a Speedrun of Chapter 5 below the target time.
Chapter 6 Speedrun (10 points): Complete a Speedrun of Chapter 6 below the target time.
Chapter 7 Speedrun (10 points): Complete a Speedrun of Chapter 7 below the target time.
Chapter 8 Speedrun (10 points): Complete a Speedrun of...