The early game tells major parts of the story via text, and much of the story is only portrayed in conversations. (thatvideogameblog.com)
Please do not continue reading if you would get upset at having major parts of the story revealed. (gamesetwatch.com)
«The other major part of the story is that in mycorrhizal lineages there is a huge turnover in genes that are upregulated in the symbiosis - many of these have no homologs in even closely related species, suggesting that the evolution of the symbiosis is associated with massive genetic innovation.» (sciencedaily.com)