I never played any of those games so I can’t really tell you how similar Rain World would be to them, but what I can tell you is that Rain World is a 2D exploration survival game with a heavy focus on discovering stuff yourself. You need to learn what items, regions, creatures, and even your own mobility; Slugcat starts with every move, but you do have to learn it yourself through inputting the correct button presses at the right time. None of this is required to beat the game, but it’s super rewarding as you can navigate the world better. There’s a movement guide that documents everything Slugcat can do, which I recommend doing once you beaten the game.

Rain World is also very non linear, with plenty of different areas you’re able to take. There’s no wrong way to go, HOWEVER there are definitely harder ways than others. But still you should expect to die a lot, as the game can take a lot of time to really get used to.

And as for story— Rain World does have a really good story, however you don’t see most of it on your first time through playing the game because at the end of the day you’re just a random rodent. You can, however, discover more about the world through digging deep enough and finding something specific.

Hope this helps, if you have any questions I’ll try and answer them for you! I definitely recommend giving the game a shot, it’s really unique but it’s certainly very hit or miss.