Damien is a minor villain in Telltale Games' Game of Thrones video game, appearing in Episode 2, "The Lost Lords". He is a guard commander for House Lannister in King's Landing.
Damien is first seen after Mira leaves after speaking with the Merchant Lords, Andros and Morgryn. He later leaves her a note to meet him in the garden at midnight. She does as he asks and goes to the gardens at midnight. Lucan catches her and then Damien comes up and tells him to stand down. He tells him that she's with him and Lucan departs. Damien says that Mira's made enemies of the wrong people and pulls out his knife and attacks her. Damien begins to choke her but Tom saves her by hitting him over the head.
Damien overpowers Tom, beginning to drown him while Mira is given the choice to kill him or run for her own life. Damien grunts, "Fuck you." as Mira sticks the knife in his neck. If Mira ran, Damien is seen continuing to drown Tom as Lucan asks where Damien is.
In later episodes
If Mira ran from Damien, Tom briefly mentions that he killed him despite him drowning Tom.
He is mentioned by guests at Tommen's coronation feast, gossiping that a Lannister soldier (who was Damien) was killed right where they were standing.
It is revealed that Rickard Morgryn was the one who bribed Damien to kill Mira Forrester, and that Lucan was promoted to captain in Damien's place. Mira or Tom are executed for his murder.