Having hetero relationships in a game is simply the safer option. Perhaps in the future we can toggle a preference switch at character creation if we're going to have a love interest character thrust upon us (so a gay gamer could chose manlove to have Alex instead of Alyx, Eddie instead of Elena, etc.).
Beyond that, there should be no classifications and any love interest in a game should be based solely upon who you as the character elect to pursue. Fable 2 had that right, at least, but not every game can have boatloads of straight/gay/bi NPCs roaming around for you to take home on a whim. Games like Half Life 2 and Uncharted really benefitted from the female sidekick/love interest character in terms of story and maybe in part that was because they weren't oversexualised eye candy. The interest was subtle and you could easily explain it away by simple comraderie or admiration if you don't like the idea of Nathan and Elena as a potential couple (in a 'we just escaped certain death about fifty times and I'm horny, damn it' way, naturally...)
But the simple fact is, it would have appealed far less to the mainstream gaming audience for Nathan Drake to have had an infatuated guy following him around. It's not a matter of outright homophobia, it's just the less-travelled path. Plus, there's enough drama stirred up from the media and religious groups when they put straight sex in a game. Imagine how they'd react to a gay protagonist! I can already see the Fox news report in my mind...
ACTIVISION DEVELOPS GAY SEX SIMULATOR
In the latest addition to their "Most Wanted" range of videogame titles, Activision follow up Call of Duty: World at War with their controversial homosexuality sim, Cock in Doody: Slam it Raw. In this game, targeted at impressionable teenage males, you take direct control of Major Schlong, a decorated Vietnam veteran who after years of prestigious service is conscripted into a secret US army test program in which his is psychologically tormented until he is twisted into a life of homosexual servitude to perverted Democrats. In this graphic depiction of REAL homosexual relationships, the player directs Maj. Schlong in first-person perspective through an ever increasingly depraved series of unsafe sex acts.
queergamers.com has forwarded us their review of the game, having received an advance copy. The first game to be played by homosexuals in the history of videogames has been offered generous nine stars out of five, and is considered "fabulous" by all participants.
More on this as it develops.