2 games under development, that I haven't seemed to see mentioned here:
B.E. Grove has The Pill, following story arcs for 2 different women who purchase pills with growth related side effects. The latest version even has voice-over acting for Belle. You can get a free public version here:
https://www.patreon.com/begrove/overviewA number of other BE / growth related comics and animations can be found for patrons too.
Another, recently released game entitled Hypnosis which states:
"Plot:
You moved in with your best friend and his family under one condition:
That you don't hook up with your friend's cute little sister Leah who has a crush on you.
The game begins with Leah complaining that her boobs are too small, so to make her feel better you pull out your grandfather's pocket watch and wave it in front of her, telling her that her boobs will grow. This somehow works, and soon all of Leah's friends are asking you to **100** them also."
You can find a public release here:
https://www.patreon.com/expandinguniverse/overviewBoth are well worth looking in to!