5 DAYS

Description:

There used to be no risk at staying in this subterranean complex. Everything changed when there was a gas leakage and all the ventilation pipes had to be closed so people would survive long enough to be rescued, if rescue ever come in time. Although it's impossible now to contact anyone outside, the emergency button has been pushed and, using nothing but the WASD keys and the Mouse, the main character has to survive for 5 days, the maximum amount of time the team may take to arrive, clear the area from the poisonous gas and then let everyone free.