Poison Gas is a dangerous, green gas created by Spore Flowers, Gas Pillars, and Elite Gas Stingers, that deals 5 damage per second to the pioneer and some other creatures. The Gas Mask with Filters can be equipped to temporarily prevent taking damage from it. Spore Flowers and Gas Pillars, when destroyed by the explosion from a Nobelisk or Explosive Rebar, will stop producing poison gas.
The screen becomes tinted red while in poison gas, even with the Gas Mask equipped. If in an Electric Locomotive or Hyper Tube, the screen will take on a yellow tint when passing through a visible gas cloud, but no damage will be taken.
- If the pioneer only stays in the poison gas for less than 1 second, then no damage will be taken.
- If the pioneer is within the radius of multiple sources of poison gas, they will take more damage than if stood within the radius of only one source.
- Poison gas also deal damage to Hogs and Spitters, which can be observed around Crash Sites where creatures within the gas die quickly.