Thrive is a free, open-source game about the evolution of life. From the lowly tidepools of your home planet, you will rise to cosmic dominance. At every step, powerful creation tools and deep simulation mechanics will aid your species’ developmen...
Warner Bros have a gameplay mechanic patent which has pretty vague wordings.
And although this game doesn’t seem like it’d turn out similar to any of the games they made under that patent, I would expect them to try harassment.