This is the real Monster Hunter Rise, not a cut-down mobile cousin. The game is installed and runs on your phone or tablet, rather than being streamed from a server, which matters for a game where dodging a monster’s attack depends on quick reactions.
For newcomers, Rise is an action role-playing game set in the Japanese-inspired village of Kamura. You take on hunting quests against huge monsters, then use materials from the beasts you defeat to craft better weapons and armor. It introduced the Wirebug, a grappling tool for zipping around maps, and Palamutes, dog companions you can ride.
The store listing describes the original game and says nothing about Sunbreak, the large expansion released after launch, so don’t count on getting it. Online multiplayer for up to four players is supported, but there’s no word on cross-play with console or PC versions.