What is Overwatch Stadium? Overwatch has experimented with many game modes over the years, but none of them have had the impact that Stadium has. Introduced to Overwatch in April last year, Stadium is a round-based game mode that plays similarly to a MOBA. Featuring powerful unlockable items, you can construct builds to help your team steamroll the competition. There are so many differences between Stadium and regular Overwatch, Blizzard can't just drop all the Overwatch characters and abilities into the game mode without careful consideration. As a result, you won't find all of your favorite heroes in the multiplayer game just yet, but everyone is slowly being added to the roster with each coming season. Here's everything you need to know about Overwatch Stadium, including how it works, what's coming to the game mode, and much more.