Seref Hasan is a character featured in Dying Light.
Events of Dying Light
He was a survivor who formerly resided within the Tower. However, he followed Roy Hanson, who at one time managed security for the Tower, in his effort to establish a new safe zone at the Slabs. They fortified the area and electrified the fence, but Hanson was killed by infected after falling off the roof; he lost his footing while climbing down to adjust the generators, breaking his back and attracting the infected with his cries of pain. As he was the only one in possession of the key, the remaining survivors were trapped.
After 14 days of being trapped, they made a pact to commit suicide with Hanson's cyanide pills which left no survivors. Hasan recorded a radio message requesting help, to no avail. He also left another recording identifying himself and detailing the final actions of his group.