First text adventure videogame

Colossal Cave Adventure, created in 1976 for the PDP-10 computer was the first "text-adventure" video game. With puzzles, an element of fantasy and a command system, it introduced much of the groundwork from which point 'n' click adventures drew their inspiration. Players would read a description of their location, then choose what to do next by typing commands such as "enter building" or "go north".