I didn't buy Gungeon when it came out because it seemed lacking in content, but over the years it's received a number of updates that added a decent chunk of stuff. The variety of guns is insane, though they're locked behind a progression system that is kind of a slog. Each character has their own little backstory and the general theme of building a gun that can kill the past is interesting. Coop is really fun and you have a few ways to interact with the other player, like reviving them and swapping guns. While it doesn't have the replayability of something like Isaac, like most roguelikes it's more that worth the money you're paying.

I'll be honest I don't like turn-based JRPG combat. In fact I kind of hate it. But the story here is fantastic, as is the music. I get this warm and nostalgic feeling playing it, because you're a high school student. It does have some annoying anime tropes but it is so engrossing. And the combat difficulty can be changed on the go. I for instance prefer to put the difficulty on easy while fighting dungeons mobs, and then increasing it to hard while fighting bosses. Something like skipping the grind. For people who love the combat though, you have a cool system of mixing Personas (your creatures) and creating new ones. Keep it mind that you can't can't max your relationship with everyone in one playthrough, which also means you can't get all the achievements, so if you plan on doing that it's best to play however you want on the 1st playthrough and look at a guide on the 2nd one (you're going to need it). While Persona 5 has better combat, it's worth experiencing this game's quaint charm of a small town.