What’s Up with Uma Musume: Pretty Derby, the Game Taking Over the Internet?

What’s Up with Uma Musume: Pretty Derby, the Game Taking Over the Internet?

You’ve likely heard of the anime horse girl gacha game Uma Musume: Pretty Derby that has taken the internet by storm. If you’ve used any social media over the last couple of weeks, there’s a very good chance you’ve seen screenshots or videos from the game—or at least people talking about it. Why did it get so popular, so suddenly, though?

Globally released in late June, the game is about training a selection of cute anime girls with horse ears and bushy tails to compete in races (they run two-legged, which I have mixed feelings about). The cast of horse girls are based off of real racing horses, mostly from Japan, and the still-living ones are enjoying newfound fame from the game. Uma Musume: Pretty Derby is successful in the gacha game genre, which are generally free-to-play games that incentivize players to use in-game currency for improving or progressing gameplay. Gacha games are known for employing addictive tactics such as providing intermittent free “pulls” to encourage players to spend money, limiting the availability of desired drops to encourage impulse purchases, and elaborate conversions for in-game currency to obscure costs.

Uma Musume: Pretty Derby is divided into two segments: the training portion, where players skip through dialogue and level up stats; and the cinematic race, where players kick back and observe their horses’ performance. This racing segment translates fantastically to streaming—streamers and audiences are unified in their lack of control, together observing with nail-biting tension as they anticipate whether their horse girl will pop her ult and secure victory.

The current most popular Uma Musume: Pretty Derby streamer is Northernlion. According to TwitchTracker, the 36-year-old Canadian father has seen a significant spike in viewership upon caving to his chat and booting up the game in July 2025. Northernlion also competed alongside other popular streamers in an Uma Musume tournament hosted by Ludwig. I won’t spoil who won, nor who was sentenced to dance and sing one of the songs from the game (did I mention the horse girls are also pop idols?) as punishment for losing the worst.

Uma Musume is a multimillion dollar franchise consisting of the gacha game available for mobile and PC, as well as an additional game, an anime series, several manga, and even a stage play. Uma Musume: Pretty Derby was released by multimedia studio Cygames, a subsidiary of the Japanese IT company CyberAgent, who also created the new anime The Summer Hikaru Died

 

 
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