Here is the full list of all 17 Randall achievements.
Complete the tutorial level.
Enable the teleporters in the city.
Rescue the resistance leader in the prison.
Get the location of the secret entrance to the lab.
Defeat the boss in the catacombs to get information.
Obtain the good ending.
Obtain the evil ending.
Find the collectable object in the Academy.
Find the collectable object in the Prison.
Find the collectable object in the Factory.
Find the collectable object in the Recycling Facility.
Finish the game on hard mode.
Win 5 fights without taking damage. (Hard Mode)
Win 10 fights without taking damage. (Hard Mode)
Win 20 fights without taking damage. (Hard Mode)
On hard mode, never die on a fight.
On hard mode, never take damage in a fight.