Currently Online 
Harvestella.
First you think it is just a farming sim. Which it is. But a good one. Infinite water without needing to ever refill is fantastic.
Then it feels like a little bit Metroidvania. You "fix" ladders which you can use as shortcuts. You fix bridges (but need an item), you can bomb places for treasure (again needing an item). And later you need level 2 repair, level 2 bomb.
Then you get some RPG in there. You get different skills, different classes, different team mates etc. Accessories, guests etc.
You are going through the chapters. Unlocking various things etc. Following a story line that is okay and you don't expect much. Then you get slapped with a twist. The twist, combined with the music, the layout etc you scream (if you've played) wtf is this Chrono trigger? And then the story completely opens up and you realize there is WAY more to it.
You are bound to love Earthbound.
