Ender Lilies
It’s a mechanically strong Metroidvania with branching paths, hidden areas, and exploration, but what I love about it is the atmosphere and the juxtapositions is uses.
It is a crumbling decaying kingdom full of monstrosities, and the main character is an innocent little girl in a pure white dress. Lily does not attack, some of the monsters she is able to purify to restore their mind at which point they help her. So when you attack a monster appears to do the attack animation, while lily cowers a bit behind it.
One thing I love is when you are in a boss fight and shit is going down hard, the sound track is extremely chill piano music. The soft and beautiful contrasts against the harshness of the situation is a very compelling way.
The sequel Ender Magnolias is good as well. Mechanically there are some improvements, but I don’t feel like the atmosphere or world building is as good. That may be because I played Lilies and was used to it. If your haven’t played either I’d suggest starting with Lilies, and if you like Magnolias is worth your time.
I’m on the fence about which is better. Portal 2 is an improvement, but also has its flaws.
Part of the reason I would argue Portal 1 was better is because it was so unexpected. I went in expecting “interesting puzzle game” which it is, but I did not expect to also get “excellent humor with strange horror vibes and incredibly good personality.”
If someone didn’t know what a Glados was I think the first one is better. I also recognize that many people who have never played Portal are well aware of Glados.