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