User blog comment:The Deadliest Warrior/Achilles vs. Hercules/@comment-173.209.212.207-20150915134709

Achilles by mythological specification was known as a demigod even though his mother was said to be nymph, but still, he turned out to be a demigod. Achilles actually did not die from the heel shot, however, it was the reason why he died. Shooting him in his weakspot lowered his shield, and gave way his body for a finishing shot. So yeah, the arrows to the chest may have been fatal, but as far as the myth goes, they wouldn't have been able to kill the mighty Achilles without his shield of immortality being lowered.