During the battle, Simon is shot and injured. If Markus doesn't save him, or tries to without enough cover fire, Simon dies. If Markus saves him, Simon tells him that it was wrong to sacrifice other androids in order to save him.

How do I get Simon to give Markus his heart?

Simon Offers his Heart: Only if Simon is alive and North is either dead or not lovers with Markus. North Offers her Heart: Only if North and Markus are lovers.

What is the best ending in Detroit: Become Human?