There are the Noahide Laws that applied to all of humanity, post-Flood. Pre-Flood, humans weren't allowed to eat animals. Post-Flood, "any animal is fair game, just like the plants you ate until now."
Eventually the Torah would be given at Mount Sinai, and Jews would have further restrictions (in Leviticus) on which animals they could eat.
So Noahidism — i.e. Judaism's expectations of basic ethical monotheism — allow eating any animal so long as it was dead first. Jews have to be pickier.
Today, if someone who was neither Jewish by birth nor conversion shows up at a rabbi's office and says — Shalom! I want to do right with the God of the Torah, but I really like bacon! The rabbi would tell them that is 100% A-OK. All that's expected of them is keeping the Seven Noahide Laws.