Zelda-clone that's a hidden gem for family couch co-op
The game starts you off slow, with a single class and a single dungeon, no tools, no quests, just a lonesome NPC called Griff that "loves building". As you bring back gems from your adventures, you begin to expand your town with clinics, blacksmiths, tailors, and this in turn brings more villagers in, unlocking the game itself. Soon you'll master the first dungeon and get a good feel for the game and combat, unlocking the grappling hook only to realize the game world is actually pretty huge.
Playing with your family in couch co-op is a great experience. Things are just the right amount of hectic for my 5 year old, who manages to handle the game well, even though the menus were a bit overwhelming at first, the tool selection is a bit cumbersome and there's a lot of inputs to memorize (every button is used except Left Trigger). But doing the dungeons together can be fun, rescuing them when they're in trouble and letting the kids figure out some of the puzzles is very cute, though they're not all that easy, some will have you scratching your head. And by no means is the combat easy either, but some hard work and level ups later, the whole gang will manage just fine.
After all that, there's more than 8 dungeons and each has it's own particular biomes, puzzles, enemies, bosses. There's a bunch of things to collect, too, like new classes! Spells. Also, lots of quests! Tools that allow you to explore new areas! Fishing! Potion brewing. Make sure to explore every nook and cranny of this huge game world.
My only experience is playing this with my family and we have a lot of fun, but would I recommend that you play it solo? You can, but it's not exactly a rewarding story, in fact, the ending is super "meh" and just spits you back into town (really horrible for all the work you put in), but your kids will be jumping up and down with joy that they defeated the Titans. But it was never really about the ending, it's a journey that's way better when shared.