Alex Mercer

Alex Mercer is a playable character of video game, Prototype.

Biography
Once a human, Alex works for an evil company known as Gentek. He has no empathy, as evidenced when he is questioned of how does he feel of creating a deadly virus, he replies that he "wasn't paid to feel".

One day, he is pursuited by Blackwatch, an evil military and took a vial of the virus as "insurance". Alex is cornered by the team in Penn Station. As a result, he drops the vial to the ground, hoping it would kill the team. He is shot to death afterwards.

The virus then takes over Alex's body and has amnesia, believing itself to be him. Since then, his mission is to get revenge on the people who did this to him.