Killing Floor 2 Summer Sideshow - the ZED Circus Event

Summer is the season of the ZED circus. Killing Floor 2, Tripwire's co-op wave shooter, has a seasonal event that fans wait for every year: the Summer Sideshow. Whether you are a veteran ZED hunter or just starting, the event brings new challenges, exclusive cosmetics and hordes of ZEDs dressed up as circus freaks. This page explains what the event is, looks back at past editions and answers a common side question about whether the series has a campaign.

Killing Floor 2 seasonal event key art (Krampus Christmas). Every season gets its own themed look, the summer one being the circus.

What is the Summer Sideshow in Killing Floor 2?

The Summer Sideshow is more than a limited-time playlist; it is a tradition across the Killing Floor series. Both the original Killing Floor and Killing Floor 2 ran it as a yearly event that reshapes the game with fresh content and new ways to play for the duration of the event.

The centerpiece is usually a new themed map. These are not ordinary levels: they lean on circus or steampunk settings, packed with macabre details and black humor. Picture fighting waves of ZEDs inside an abandoned big top or a grim steampunk amusement park. It is as unsettling as it is fun.

The changes do not stop at the scenery. The ZEDs get a makeover too: zombie clowns, grotesque strongmen and other sideshow freaks replace the usual models, so you are never quite sure whether to laugh or scream while you try to survive. The reskin is mostly cosmetic, but it gives every match a different flavor and makes the event memorable.

Event ZED skins next to the standard models from the original Killing Floor; the clown Bloat in the top row is the circus look.

Event tickets and cosmetics

On top of the maps and the circus aesthetic, the KF2 Summer Sideshow typically brings event tickets and exclusive cosmetic items. Tickets are earned by playing during the event and can be spent on a wide range of rewards: themed hats and masks, full outfits and weapon skins. Dressing up your character with these items adds a layer of progression and a reason to keep playing until you have collected everything. For more on the item system see KF2 cosmetics.

A look at past Summer Sideshows

The KF2 editions show how the tradition grew:

Edition	Dates	Notes
Summer Sideshow 2017	June 13 - July 11, 2017	The first KF2 Summer Sideshow. Set up the circus theme and the template later events followed.
Summer Sideshow 2018: Treacherous Skies	June 12 - July 10, 2018	Kept the theme going with new content and cosmetics; the name points to a sky or airborne setting.
Summer Sideshow 2019: Back and Kicking Brass	Not announced in the source	Details are thin; the title hints at a return in force and a brass, steampunk flavor.

The specifics change from year to year, but the constants stay the same: a circus or steampunk theme, new maps, transformed ZEDs and exclusive cosmetics. Each edition is a chance to experience KF2 a little differently.

Seasonal reskins are a series habit: the original Killing Floor's Christmas ZEDs, from the Santa Bloat to the gingerbread Gorefast.

The tradition goes back to the first game: the 2011 Summer Sideshow in Killing Floor 1 added the KF-AbusementPark map, and later events reused and reworked those circus ZEDs. The full history of KF1 events, including cut content, is on the Killing Floor event content page.

Beyond the Summer Sideshow: does Killing Floor have a campaign?

A common question from new players is whether Killing Floor has a story campaign. The answer is yes, but not in the main games.

Killing Floor: Incursion, a spin-off built specifically for virtual reality, has a full narrative campaign. It is split into five fully voiced stages and digs into the secrets of Horzine, the corporation behind the ZEDs, and its relationship with the creatures. Along the way you move through settings such as eerie farms and catacombs and fight with pistols, shotguns, axes and even ZED limbs used as improvised weapons. The campaign can be played in co-op with a friend.

Killing Floor 2 "Tidal Terror" seasonal update art. Seasonal updates swap themes, but the ZED roster underneath stays familiar.

Incursion also has Holdout, an endless survival mode where you hold out against increasingly tough ZED waves to see how long you last.

Killing Floor 2 itself focuses on wave-based co-op action and has no traditional narrative campaign. The series tells its story through spin-offs, lore and events, while seasonal events like the Summer Sideshow keep the core game fresh. Background reading: the series story explained and Horzine Corporation lore.

Seasonal key art with monster-movie versions of the ZEDs, the same idea as the circus makeover applied to another theme.

Conclusion

The Summer Sideshow is a must for Killing Floor 2 fans. A circus theme, new maps, transformed ZEDs and a pile of exclusive cosmetics make it a refreshed version of the game that veterans and newcomers can both enjoy. Watch the official KF2 announcements for the dates of each new event, then step into the ZED circus and see how long you survive.