The first prize of priority registration engulfs Greendale Community College in a Spring Fling paintball war.

When Jeff introduces an element of randomness into Troy and Abed's housewarming party, reality splits into six timelines.

A $100,000 paintball war prize pits members of the study group against one another, until they decide to join forces to stop a mysterious challenger.

Abed invites "Fat Neil" to play a game of Dungeons & Dragons with the rest of the study group, hoping to boost his confidence, after Jeff becomes concerned about him being a loner. When Pierce finds out he was not invited, he joins anyway, disrupting their plans.

As the paintball war is revealed to be a City College plot, Jeff and Troy vie for control of Greendale's ragtag army, while Pierce betrays the group.

When Jeff tries to obtain credit for a fictitious class, the unintended consequences rock Greendale. Abed and Troy build an elaborate blanket fort.

When the yam the study group was growing for biology class is killed, Troy and Abed are on the case.

Pierce and his closest friends are summoned to Hawthorne Labs to play a video game that will determine who will inherit his father's fortune.

For Troy's last day at Greendale, Abed holds a campus-wide "hot lava" fantasy game. With a comic book worth $50,000 as the prize, it's an all-out war.

The former study group's future — and friendships — are put to a test when one chapter of their lives closes and a new one begins.

A scheme to replace a corrupt cafeteria employee transforms the study group into a criminal gang run by a power-hungry Abed.

The students of Greendale are drawn into an epic pillow fight as Troy and Abed start a war that threatens to destroy their unique friendship.

Dean Pelton's army surplus party food sparks an outbreak of zombie-ism at the Greendale Halloween party.

Pierce's funeral leaves the study group with mixed feelings, especially after their late tormentor leaves one last test to reveal everyone's secrets.

Annie's missing pen leads to friction within the group.

After Abed is caught trespassing at Greendale, he and his friends visit a psychiatrist.

Working on their final anthropology diorama, Chang finds a cache of items stolen by Troy's monkey that dredge up unhappy memories for the study group.

As Dean Pelton films a new commercial for Greendale, the production takes a wild turn once he discovers that a famous alum has agreed to appear in it.

The study group stages an elaborate heist to break in to Greendale and free Dean Pelton from the clutches of Chang.

With the mysterious Ass Crack Bandit back at Greendale, Annie and Jeff are on the case. As clues and suspicions mount, Shirley delivers shocking news.

The study group helps Abed land a date with a girl, and Jeff squares off with a P.E. coach who insists that he wear gym shorts to a billiards class.

Jeff and the group arrange a Pulp Fiction birthday party for Abed, but he has his own plans, starting with an expensive dinner for himself and Jeff.

A new caste system takes over when Greendale beta tests an app that ranks everyone. Shirley loves her new status, but Jeff and Britta want it stopped.

Heroes are born, promises are broken and the stakes are raised when paintball makes an explosive return to Greendale's campus.

As Jeff is drafted to help lead Greendale's debate team against the formidable City College, Abed's film-class projects appear to predict the future.