The next event in the Overwatch universe is officially here. It’s called Overwatch Uprising, and it’s our chance to look into the heroes’ past. The in-game event occurs before the fall of the Overwatch team and marks Tracer’s first mission.

The event runs from today until May 1, 2017. There are over 100 items to earn.

Here’s the word from Blizzard:

Experience a pivotal moment in history from before the fall of Overwatch. Join a strike team of Overwatch agents—including the newest recruit, Tracer—as they undertake a vital mission to stop an omnic uprising in King’s Row. Drop into the action and play as one of the four charged with completing this critical objective.

The King’s Row event they mention is a PvE-style brawl that pits heroes against omnics on King’s Row.

What about those sweet, sweet skins!?

Here are all the skins available during the event. Again, it runs until May 1.