In Dynasty Warriors 7 (2011), players can have close relationships or even marriages to NPCs. According to this thread marriage can only be achieved with NPCs that are not the same gender as the PC, whereas “sworn siblings” can be same-sex pairings as well. However the scenes for both “events” are very similar. Some players have read these as examples of possible same-sex relationships in the game. For other games in the series, players have used mods to allow for same-sex marriage scenes such as this one:

Screenshot from https://www.youtube.com/watch?time_continue=6&v=TTGdSRcpfR8
LGBTQ references in this game series:
Dynasty Warriors (1997): Zhang He
Dynasty Warriors 7 (2011): Same-sex relationship
Dynasty Warriors 8 (2013): Li Dian, same-sex marriage mod
Citations:
- Dynasty Warriors 7 Empires Info thread. (n.d.) Playstation Trophies. Retrieved from https://www.playstationtrophies.org/forum/dynasty-warriors-7-empires/171467-dynasty-warriors-7-empires-info-thread.html
- For people who wanted same sex marriage… (2015, March 30). Steam Community. Retrieved from https://steamcommunity.com/app/322520/discussions/0/618457398977466520/
- NueFeiPai. (2013, February 23). Dynasty Warriors 7 Empires- Event marriage. YouTube. Retrieved from https://www.youtube.com/watch?v=pDVBIn5i4CY
- So, gay weddings are possible in this game… (n.d.) GameFAQS. Retrieved from https://gamefaqs.gamespot.com/boards/672622-dynasty-warriors-7-empires/65547772