Overwatch 2 launches new single-player mode, a replayable high-score run

Overwatch 2 launches new single-player mode called Hero Mastery
Hero Mastery is a high-score focused mode with training bots and obstacles
Players test skills as Mercy, Reinhardt, and Tracer on character courses
Beat challenges by Sept 25 to earn rewards like charms and sprays
Compete on leaderboards against other players in your region

polygon.com

Relevant topic timeline:

9/7/2023

Overwatch 2 Sept 7 patch notes: Zarya buffs, Orisa nerfs, big support updates, more - Dexerto

The mid-season patch for Overwatch 2 has been released, featuring the addition of Hero Mastery Mode, the Overwatch Anniversary event, and various hero balance changes including nerfs to Orisa and Baptiste.