Homophobia has long been an issue in the gaming community and larger fandoms.
HBO's series is based on the 2013 video game of the same name and is set 20 years after a fungal pandemic leaves the world in ruins.
Sunday's episode, titled "Long, Long Time," depicts a gay romance between Bill, played by Nick Offerman, and Frank, played by Murray Bartlett.
Echoes of "gamergate" could be seen in criticism against "The Last of Us Part II," the 2020 video game sequel, in which Ellie's sexuality is further explored.
On Metacritic, it has a 5.8 user score, while the first game received a 9.2 user rating.