Corrosive gas

Corrosive gas is a damaging gas that can seep through walls and other occluding objects, often destroying them in the process.

Damage
The damage done by corrosive gas depends on the target:


 * Corrosive gas deals damage to creatures and robots.
 * Corrosive gas deals significantly increased damage to:
 * Walls, doors, furniture, chests, statues, and similar objects.
 * Corrosive gas deals no damage to anything with the  tag. This includes all weapons, armor, equipment, scrap, cybernetics, energy cells, garbage, food, trade goods, corpses, books, water containers, urns and vases, quest items, and most other similar items a character might carry around in their inventory. Furniture items, such as  or  are affected, but any items within will drop to the ground undamaged.
 * Corrosive gas deals no damage to anything with the  tag. This includes all weapons, armor, equipment, scrap, cybernetics, energy cells, garbage, food, trade goods, corpses, books, water containers, urns and vases, quest items, and most other similar items a character might carry around in their inventory. Furniture items, such as  or  are affected, but any items within will drop to the ground undamaged.

The following damage formulas are used to calculate corrosive gas damage:

In practice, gas damage is highly variable due to a significant amount of randomization involved in gas behavior.

Gas is constantly moving between cells, dissipating over time, merging with other gas, and being affected by random calculations in the game engine. Its density, which is the main predictor of damage, is always changing.

The density of corrosive gas can get much higher than 100 with the Corrosive Gas Generation mutation. With that mutation, a creature releases 100 density units of gas into the cells around them each turn, and can continuously release gas for many turns depending on mutation level. This can result in very high density gas if the mutant releases all gas into the same area without moving.

The following table indicates how much damage corrosive gas of a certain level will do per round, depending on gas level and density. Keep in mind that enemy acid resistance may reduce these numbers.