Breeders Of The Nephelym [v0.756.5a] -

It is free on Steam , but Patreon supporters receive "Early Alpha" builds with the latest features before they reach the public version.

💡 If you enjoy creature-collecting games like Pokémon but want a mature, open-world experience with a focus on genetics, this is arguably the highest-quality free option available in the genre. To help you get started or decide if this is for you: Breeders Of The Nephelym [v0.756.5a]

An intricate genetic system allows for inheritance across 29 traits. You can cross-breed different species to create hybrids and aim for specific stat ranks (E to S). It is free on Steam , but Patreon

It features deep character creation for the breeder (Male, Female, or Futinary) and extensive appearance options for the Nephelym. It is free on Steam