Save time itself in Fate/Grand Order
Fate/Grand Order (FGO) is a mobile RPG based on the Fate visual novel series. In it, you play a hero sent back from the far future to the modern day. In between narrative scenes that advance the game's plot, you'll do battle using a rich card-based combat system.
Assemble a team of legend
The heart of Fate Grand Order is its card-based combat system; your character will assemble a hand of Servants. These are famous characters from history and legend, each of whom has different attacks and abilities; the most powerful of these is the Noble Phantasm. Combining your Servants' attacks correctly produces bonuses for the team. As the game progresses, you'll acquire new cards that allow you to level up (or "Ascend" your servants). The game is divided into chapters, each of which takes place in a different historical period.
An interesting game to explore
Fate/Grand Order has an interesting story and setting, but the main reason to play it is its interestingly different combat system.