Overwatch’s newest seasonal event, Uprising, kicks off today on the PlayStation 4, Windows PC and Xbox One versions of the game. Uprising takes the cast of Overwatch back in time and gives players a chance to relive a “pivotal moment” in the game’s history.

The event includes a new cooperative brawl, called Uprising, in which Tracer and her Overwatch compatriots battle waves of Omnic extremists — dubbed Null Sector — in a modified version of King’s Row. Uprising will be playable in two forms: one in which players play as either Tracer, Reinhardt, Mercy or Torbjörn, and one in which players can choose from Overwatch’s entire 24-character roster.

In addition to the new brawl, the latest seasonal event also includes more than 100 cosmetic items that can be earned from loot boxes. For a peek at the new skins, emotes, highlight intros, sprays and more, check out the gallery below.

Grid View Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

Overwatch Uprising Blizzard Entertainment

In a developer update video, Overwatch game director Jeff Kaplan said the team created Uprising in response to player feedback — namely that players were looking for more non-real world holiday-themed events and more player-versus-AI game types, after positive response to Halloween Terror’s cooperative mode, Junkenstein’s Revenge.

Overwatch Uprising will be playable through May 2.

Blizzard also released a new video that offers additional background on the Omnic uprising at King’s Row and Tracer’s first mission with the Overwatch team. You can watch it below.