Hey there!
There isn't an exhaustive list yet, mostly because the game is in flux. That's a great suggestion though, and I'll write one soon!
A basic breakdown of current planets are as follows:
- Taun, Luna and Metris-2 -> Varied content, although there's focus on Tentacles, Knots, and "Mean" content respectively.
- Hedon -> Muscles and himbos
- La'ard -> Weight gain & adjacent kinks
- Sciurus Metallicum -> Varied, plays like a web-toy, but has most kinks from various other planets.
- Sciurus Silva -> Hyper body parts.
- Procya -> Indentured servitude, "mean" content.
- Na'Ja -> Mind-control, hypnosis, spirals, etc.
- Ovis -> Breeding, eggs, and slaves
There isn't a dedicated transformation planet yet, but one is planned in the near future. I hope this answers your questions! :)