ROUTINE story and ending explained

A mysterious fungal infection from the Moon's "Canal" has rendered the lunar station uninhabitable and its crew missing. The infection, discovered in 1977, causes a rapid decline in human health, leading to death and fungal growth. The player character, a software engineer, is tasked with fixing the station's security system but is revealed to be infected. The game explores themes of rebirth and parasitic evolution, with the player ultimately succumbing to the infection and becoming part of the alien life form.