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