The Silent age

In The Silent Age adventure series the player follows the janitor Joe who works in a large building of the Archon organization. It is set in 1972 and Joe has been working for two years there. One day, he is asked to take over the duties of his colleague Frank and when he goes to his work area he discovers a dying old man who says to be a time traveler. He hands Joe a device he claims can be used to travel through time. He explains mankind has become extinct in the future and he has come back to help prevent it.