Acknowledged by critics for having a simple storyline, Incoming is set in 2009 over a period of fifteen days. An increasing number of UFO sightings culminate in attacks on the international lunar base and other locations on Earth; and the construction of a base in the Arctic. Secret work is started on an ADATA (Anomaly Detection And Tracking Array) near Mount Kilimanjaro. The events of the game take place after an attack on the ADATA facility is initiated by alien forces.