Suffocation is a condition in creatures when they start to run out of Oxygen. This is normally caused by non-aquatic/non-amphibious creatures staying underwater for too long. It can also be caused by aquatic creatures from being on land for too long. In Creatures 2, suffocation is represented as a drive: in the C2 Chemical List, suffocation is chemical 15, suffocation increase is chemical 32, and suffocation decrease is chemical 49. When a creature is suffocating in C3/DS, it will go into a drowning gait. If a creature continues to suffocate, it will most likely die of not being able to create energy.