Here's another one that has WG elements: Trap Quest. trapquest.comWARNING:
The MAIN focus of the game is sissification/genderswap if you play a male or sluttification if you play a female. It's very sex-focused, with non-consent and dom/sub situtations. These themes are not optional.
Here's why it's pretty awesome: Firstly, the game is being actively developed and the developer seems pretty on the ball as far as updates and feedback goes. Secondly, the gameplay is solid. It's dungeon-crawl game, where each room you find can contain treasure that affects you (in ways that are beneficial and/or detrimental), traps (that always affect you in a random way), and mobs (that can be friendly or unfriendly based on your appearance and apparel). Thirdly, you can toggle which content you want to experience!
It's amazing, and smoothly implemented. Fourth, there's both drawn and photograph versions of your character which change based on your appearance.
Hands-down the best adult game I've played. It even has bosses and an end-game. The fetishes that make it most applicable to this forum are weight gain and inflation, which are decently executed for not being the core concept.