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

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.

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.

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.

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

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.

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.

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

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.

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

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.

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

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

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.

Jeff sets his sights on an attractive professor, and Annie looks to boost her social standing by hosting a Day of the Dead party.

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

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

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.

The meaning of Christmas is lost and Abed's intense fixation on the holiday concerns the group in this special stop-motion animation episode.

Claiming that he is about to die, Pierce summons the study group to the hospital to bequeath his belongings to them.

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.

When a personality test suggests that one group member is a homicidal maniac, they use a series of scary Halloween stories to expose the killer.

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.