Around 1975, Will Crowther, a programmer and an amateur caver, wrote the first text adventure game, "Adventure" (originally called "ADVENT" because a filename could only be six characters long in the operating system he was using, and later named "Colossal Cave Adventure"). Having just gone through a divorce, he was looking for a way to connect with his two young children. Over the course of a few weekends, he wrote a text based cave exploration game that featured a sort of guide/narrator who talked in full sentences and who understood simple two-word commands that came close to natural English. Adventure was programmed in Fortran for the PDP-10. Crowther's original version was an accurate simulation of part of the real Colossal Cave, but also included fantasy elements (such as axe-wielding dwarves and a magic bridge).