Suffocation

A suffocating character suffers 3 strain each round at the beginning of their turn, until they are no longer suffocating (how to stop suffocating depends entirely on the circumstances that led to the suffocation in the first place, but it usually involves reaching a breathable atmosphere or removing something preventing the character from breathing). Once the character exceeds their strain threshold, they are incapacitated. In addition, at the beginning of each of their subsequent turns, if the character is still suffocating, they suffer one Critical Injury. This continues until the character stops suffocating or dies.