There are also so called 'text adventures' (although they sometimes include pictures as well), where the player types commands that are (hopefully) understood by the text parser. Popular authoring systems include
TADS,
Inform and
ADRIFT.
As mentioned above, RAGS (which stands for Rapid Adventure Game System), has a user interface instead of a text parser. It also has an interface for writing the game, which makes it less intimidating for many people.
By default the user interface includes spaces for a number of pictures (environment, PC) so most RAGS games include a large number of pictures. Being menu driven means that most RAGS games also tend to be about making choices rather than solving puzzles since you don't have deduce what the correct action is.
For various reasons RAGS hasn't been enthusiastically taken up by the wider interactive fiction community, but it has been used to create a variety of adult games. If you want to try one, I'd suggest the Rough Landing series which is my personal favorite.