I think that often times gloryholes are added to a game as an addendum, instead of the focus. It leaves the player who loves gloryhole action still craving a lot more. You get the same dick, the same renders & animations, the same dialogue options, and the same experience, again and again.
That's why I wish so bad that there would be a heavily gloryhole based game. It can have some story and still revolve around a gloryhole. The MC could be a drug addict, needing to work for her next fix. You can start out married with a family, get in an accident and start by getting hooked on pain pills. Maybe you start with the job of a masseuse or office girl, some job where sexual exploitation for additional funds would be an option. Eventually, your drug addiction gets bad enough that it gets you fired. When that happens, you may start to steal from your family/friends to get your fix. That wouldn't last long however, and your husband leaves you, forcing you to handle all expenses on your own.
Maybe you have a friend or meet a fellow druggie that tells you about the local gloryhole, or maybe you discover it on your own. (local rest stop or gas station bathroom?) But you're not broken enough to be a full-on prostitute, yet, and you conclude that at least this way you get the money for your drugs, and you don't have to interact with the guy. As the MC slips deeper and deeper down the rabbit hole of addiction, she needs to get nastier and nastier at the gloryhole of cock to earn money to keep herself afloat.
This could go on for awhile your pill dealer could get busted and you wind up going to the streets to find a new fix. You end up using heroin or some other opiate and your already bad addiction goes full blown and you lose control. The goal of the game is to wind up not in prison. However even if you get put into prison, drugs are still available and more favors need to be done to fund that. Oh, my mind is depraveddddd. STDs and pregnancy could also play a factor in the game, an extra risk and way to have to balance funds.
Chloe18 and Insexsity both have some good GH scenes, but the experience soon goes stale because you end up sucking the same dick over and over again, trying to match what the customer likes based on some little cue card cheat sheet. When in reality, a guy willing to stick his dick through a hole simply just wants the person on the other end to make it cum.
There are so many possibilities for a good GH based game to be made though, and I could see it getting a lot of attention if it was done right. If only I knew how to make games and had time for it...I would pay handsomely for one to be made, however! (Plus I have lots of ideas I'd throw into the ring!
*nudges game makers* )