Duff Center Arena

The  is a limited-time premium building released on December 8, 2015, as part of the Winter 2015 Event. During the event, it generated extra event prize currency during Acts 1 and 2.

It returned on December 21, 2016, during Act 2 of the Winter 2016 Event.

It was re-released on March 15, 2017, with the St. Patrick's 2017 Promotion, as a possible prize in the St. Patrick's Mystery Box.

It returned on March 7, 2018, during the Homer vs. the 18th Amendment 2018 Event, as a possible prize in the St. Patrick's Day Mystery Box.

It was re-released on April 8, 2020, during the Simpsons Wrestling 2020 Event.

About
The  is an arena in Springfield. The building is shaped like a beer bottle top.

Quest Based
Homer Patriotic Homer Stephanie Brockman Willie
 * Wink at Groundskeeper Willie - 60m
 * Compete in Summer Games Cornhole - 4h
 * Storm Off the Court - 2h
 * Tell Homer to Stop Winking - 60m
 * Angrily Play Tennis - 6h
 * Take It the Wrong Way - 60m

Event Quest Based
Barney Bart Homer Ned
 * Lose to Litovians in Bowling - 4h
 * Lose to the Litovians at Tetherball - 4h
 * Beat Litovians in Sports Mascot Danceoff - 4h
 * Beat the Litovians at Cornhole - 2h
 * Watch Bart Lose at Tetherball - 4h
 * Beat Litovians in Horseshoes - 4h

Trivia

 * Only one can be obtained.
 * It can be placed on grass, pavement, or dirt.