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