From a money perspective I can see why companies might want to make one since you'd almost be guaranteed a profit if enough of the Twilight fandom are of the game playing variety.
Outside of a visual novel or a dating sim I can't really see how a romance book would function as a game in the current climate (in the west). Right now a lot of the more well known games have quite a bit of action, conflict, etc. The action scenes in the Twilight series are quite minimal and usually restricted to the tail end of the books. The only way I could really see it working is if they did it as a side-story that took place in the world with the same lore, similar to games like Shadow of Mordor. However, then you'd probably lose a lot of the fanbase since my guess is they'd want a game with the core characters as the main focus where we come back to the problem of minimal action or conflict.
As for a visual novel... Well, I have no idea how well that would sell since I'm unaware of the popularity of visual novels in the west or the popularity of Twilight in Japan and South Korea.
Outside of a visual novel or a dating sim I can't really see how a romance book would function as a game in the current climate (in the west). Right now a lot of the more well known games have quite a bit of action, conflict, etc. The action scenes in the Twilight series are quite minimal and usually restricted to the tail end of the books. The only way I could really see it working is if they did it as a side-story that took place in the world with the same lore, similar to games like Shadow of Mordor. However, then you'd probably lose a lot of the fanbase since my guess is they'd want a game with the core characters as the main focus where we come back to the problem of minimal action or conflict.
As for a visual novel... Well, I have no idea how well that would sell since I'm unaware of the popularity of visual novels in the west or the popularity of Twilight in Japan and South Korea.