Marathon has a handful of different events that can spawn across the map, each with a unique objective for you to complete. Most are pretty straightforward, often boiling down to shooting some UESC. The same can't be said for Tox Clear gas rooms.
As the name suggests, Tox Clear events are basically just a loot room filled with toxic gas that'll damage you if you enter, so you'll want to make it breathable. That's easier said than done, but it's a rare occasion where you won't need to draw your weapon.
