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