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.
A new dawn
Richard's menace
Luke and Tina prisoners
Not an illusion
Luke's sacrifice
Luke marries Tanya
Bionic... hearts
Julia the fortune-teller
Luke is killed by Julia
Tanya is a serial killer
Tanya kidnaps Luke
Luke ends his life in jail
You escape to Mars
Tanya had a soul too
Luke becomes a robot
Tanya kills Luke
Luke the great scientist
Jealous Tanya kills Helen
Tanya loves Luke
Mark & Julia
Happy Ending aka master fanservice ending!
Luke tries to shoot Tanya
Tanya is arrested by police
Luke never meets Tanya