Is there a name for simple, self-contained, shorter games?

In terms of systems, I’m thinking of something that can get everyone into the game without a ton of setup or consultations of a player’s handbook, but still enough going on (e.g. a few stats and some dice-rolling) that it’s not purely an open-ended storytelling game. On the environment side, I’m thinking of enough of an environment/goal to provide some framework and direction, but not a totally on-the-rails win-or-lose story.

I know I’ve seen "onepage" RPGs, but I’m not really trying to be that restrictive. Is there a common name for this rough category of RPG, or one or more similar categories?

(Yes, I’m asking because I’m looking for games, but I’m definitely not looking for recommendations here, just some help with vocabulary so I can go look for myself.)