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