gone to hell is a victory condition where if a certain percentage of the world is hell terrain the person who contributed most to the apocalypse counter wins
animals can't enter owned territory so I scout as much as possible before they start spawning then wait till hunting to start my second wave of exploration. Currently i think the only animal that can enter territory is the minotaur, and I think that is a bug, so I usually just WB them out till everyone has got a solid start.