Posted November 12, 2021

For instance, you point and click an icon to "open" and then you point and click a door in the graphics to "open door". That phrase may or may not be visible as a text when you do it.
More specifically: even though many genres would technically be point and click games, it has been for a long time reserved, as you noticed, for games in the adventure genre. So even though technically speaking playing a real-time strategy is pointing and clicking, those are not point and click games, as crazy as it may sound.
As others have already said, the term was introduced in the adventure genre when some games moved from the then de-facto standard parser input to graphical interfaces. You may see some other games described as point and clicks too occasionally, and even though it is technically correct, it generally feels wrong.
Some casual games with some puzzles and a story may be borderline cases when it comes to genre definition.
If you haven't played any point and click games before, try Broken Sword, The Secret of Monkey Island, or Syberia. Those are among the most highly regarded games in the genre.

When the first adventure games got released they utilized something called a "parser", and you had to enter written commands to do anything in the game (commands were e.g.: go n(orth), go e(ast), climb (ladder), take (item), etc.)
Later on, the written commands were replaced by "mouse-only" steering. As in: you point (with your mouse cursor) at an object on the screen, and then click either with left or right mouse button to do anything.
Pointing and clicking came before mouses were commonplace, I don't think anyone called it pointing and clicking back then though. There were several games were you used joystick to click on graphical interface to play, just like was later the case with mouse-driven games.
One of the earliest point and click games (that is rarely called that) was The Detective Game for Commodore 64.
It was released in 1986 and it was way ahead of its time, famous Sierra and LucasArts games followed years later.
Even one look at the screenshots shows that it's actually a point and click interface though.
http://www.mobygames.com/game/c64/detective/screenshots/gameShotId,358416/