I think Undertale is such an easy 10/10 if you even kinda like JRPGs. The artstyle clearly has retro inspirations which I usually find insufferable, but the character and environmental design behind it rules. The soundtrack is consistently great, the jokes land, the combat is inventive and learning how to deal with the mechanics of each fight is wonderful. It also has the "murdering everything over and over is bad actually" message which, while done better in MOON, was done well. The worst part of it is the genocide route, and even that feels like a purposeful punishment for being a dick.