I was looking for a full Alien life cycle chart and there were only retarded or incomplete ones. How is this? I used a template from someone, changed a lot of it + added some he had missed. I think it covers all regular variants from movies / games / books. No one-off, mutated or experimental stuff is included, only the normal life cycle. Where there are no lines it indicates unknown or disputed life cycle/origin. Tell me if I missed something. Might add short descriptions later.