ASTROBOTANICA is about survival through scientific knowledge, not brute force. The protagonist, Xel, an alien biologist, finds himself on prehistoric Earth after his ship crashes during a mission to save his home planet. The local atmosphere, oversaturated with oxygen, is a deadly poison for him, so ensuring a stable supply of carbon dioxide for breathing becomes a top priority. Using his deep knowledge of botany, the protagonist is forced to study unfamiliar flora to transform it into a source of food, medicine, and a vital resource. Experimenting with plants and exploring the Pleistocene environment becomes the only way to achieve his main goal: finding rare seeds that can thrive on his dying world.