Fire Emblem Heroes is a freemium tactical combat game drawn from the Fire Emblem JRPG. Collect heroes and take a squad of four into a fight on a 6x8 square battlefield with varying terrain. Get experience, level up, learn new skills, create and equip special items.

There are five unit types (foot, armored, archer, flying, magic) and four colors (red, green, blue, black) so a wide variety of basic units. Each hero has their own set of skills (though you can merge heroes to transfer a skill from one hero to another) and there are enough triggers (being close to other heroes, doing certain pre-req actions) and synergies (one hero debuffs and another hero attacks) that at the highest difficulty fights you have to design your teams well.

For interactivity there are PvP battles (not sure if they're real time), Alliance battles (where your friend give you bonuses) and grand events (where a bunch of people help in an abstract big battle).

The quest lines each have a story running through it, JRPG style. So far there are four books each with several dozen battles plus various other side-quest stories that are a few battles each.

Still, after a few days it gets kind of boring. Without a JRPG the battles get kind of same-y and the storylines aren't enough to keep it together. Also with so many heroes you don't really get attached to them.

This is a widely popular Nintendo game and pretty entertaining but for me lacks something to make me want to keep playing.