Here is the full list of all 10 Mark & Lara: Partners In Justice achievements.
Complete the game and find out the truth with Lara
Complete the game and find out the truth with Mark
Find out who Jack was
Spot the contradiction about the name of the dog
Spot the contradiction about the chair under Thompson's corpse
Spot the contradiction on the broken glass
Spot the contradiction about Hoffmann's scream
Spot the contradiction on the time the suspect went to bed
Find out where the suspect went to school
Dig on the suspect's background