Each indie team has to show prowess in three key improv disciplines.
Long Form: A run or montage of scenework inspired by a single suggestion or input at the top of the show. The "get" can be a single word, multiple items, or even a monologue. Then the team creates and explores a new world with this inspiration. Each team has 10 minutes to show us their long form.
Short Form: It's basically a game with constraints built in and communicated up top. Like each subsequent sentences needs to start with the following letter of the alphabet, or improvisers are limited to a number of words they can speak a one time, or about 3 million other types of games. It's what you see on Whose Line Is It Anyway. Each team has 5 minutes to perform one or more short-form games.
Line Game: This is where the entire team plays and creates funny/punny lines within a given framework. If the team is playing Sex With Me, and the input from the audience is "bowling ball", then an improviser steps forward (out of the "line") and could say, "Sex with me is like a bowling ball. It's frequently in the gutter." Popular line games include 185 ("185 somethings walk into a bar..."), World's Worst (occupation), Yo Mama ("Yo mama is so [suggestion], she...."), and I Like My Men ("I like my men like I like my [suggestion]..."). I personally know 7 other line games. That means there are probably 3,000 more I need to learn. Each team has 2.5 minutes to dazzle us with their line game.