I couldn’t verify a reliable, game-specific method for getting the hazard sign in FNTD2 from the information available, so I don’t want to guess and mislead you. The closest useful result I found was an FNTD2 guide video and the official FNTD2 hub, but neither snippet clearly explains the hazard sign unlock path.

What I can say

  • The likely source for the answer is a current FNTD2 guide or the game’s official hub.
  • Community posts in the results are about a different “hazard” trophy from another game, so they do not confirm the FNTD2 item you asked about.
  • Because the available snippets do not spell out the unlock steps, the safest answer is that I can’t confirm the method yet.

Best next step

If you want, paste the in-game item description or the exact menu where you see the hazard sign, and I can help narrow it down from there.