Here is the full list of all 24 Bionic Heart achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Mark & Julia
A new dawn
Richard's menace
Luke's sacrifice
Julia the fortune-teller
Luke marries Tanya
Luke the great scientist
Not an illusion
Tanya kidnaps Luke
Tanya loves Luke
Happy Ending aka master fanservice ending!
Luke and Tina prisoners
Luke ends his life in jail
Bionic... hearts
Tanya is a serial killer
Tanya had a soul too
You escape to Mars
Luke is killed by Julia
Luke becomes a robot
Luke tries to shoot Tanya
Tanya is arrested by police
Tanya kills Luke
Jealous Tanya kills Helen
Luke never meets Tanya