Uploaded June 2016 | Updated September 2026, 2 weeks ago

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Prerequisite Quest:
Plague City- youtube.com/watch?v=pLXpt_-WjzE

Biohazard is the sequel quest to Plague City, where we find out what is really going on in West Ardougne.

This is an easy-to-follow, beginner-friendly tutorial on the Biohazard quest on Old School RuneScape. Let me know if you have any suggestions for my future quest guides! Thanks for watching!