From ZDoom Wiki
Intermission refers broadly to anything that is part of an on-going game and before or after a level, without being a level itself. There are two kinds of intermission:
- Tally: this screen (not seen in hubs) debriefs on the finished level, providing the player's score in killing monsters, finding secrets and picking up items. It also presents the name of the next level. In Doom and Heretic, these screens are used to present a scripted overworld map showing the player's progression.
- Story: this screen or series of screen narrates the story so far with text or images. This, too, can be scripted, using an intermission definition in MAPINFO.