What Umamusume: Pretty Derby is
You take the role of a trainer for the Umamusume, runners who carry otherworldly names and run toward the goal in front of them. The core loop is a sports life simulation built around a deep training system: you scout trainees and supporters, raise a runner's abilities, and enter her in races to reach her fullest potential. The roster includes over 20 Umamusume, among them Special Week, Silence Suzuka, Tokai Teio, Oguri Cap, Gold Ship, Vodka, Daiwa Scarlet, Mejiro McQueen, Symboli Rudolf, Rice Shower, Haru Urara and Nice Nature, each with her own story to work through. Races are shown in 3D with live commentary, and after the finish the winner takes the stage for a concert.
How a group plays it together
Races put up to 18 Umamusume on the track competing for first place, so there is a lot happening at once to talk about while it runs. The Steam version carries Online PvP, which is the way to line your trained runner up against other players rather than only the field the game sets for you. Between races your group can compare how each trainer built and raised their Umamusume, since the training decisions you make are what decide whether she has a shot at the crown. The game also lists Singleplayer among its tags, so you can work through training and stories on your own and still have something to show the group afterward.
Before you start
This is a free-to-play simulation and sports title with management at its center, so expect to spend most of your time deciding how to train and which races to enter rather than steering a runner by hand. Progress comes from cooperating with your Umamusume and putting in the work over many attempts, and the roguelike and roguelite tags point to runs that vary each time you set out. The tone mixes competition with story: the runners' tales are described as dramatic and emotional, and the presentation leans on anime-style 3D performances, cute character moments and some humor. Set aside time for the visual-novel-style story segments as well as the races themselves, since raising a Umamusume to her goal takes both.