Primordia

The apocalypse happened, but not how anyone expected. Just a few months ago a weird alien ship came down and terra-formed the planet. First everything burned down, then strange jungles and creatures appeared all over the world. The vegetation was oddly colored in purples and blues. Strange races inhabited the jungles, and new foreign creatures live there. Your small group was able to survive in a fallout shelter. You have no idea if any other humans are left. Are the aliens hostile?