Non - Mainstream Games. Why We love them

Alright everyone, let's see what non-mainstream games you enjoy playing and why. Feel free to go into as little or as much detail as you'd like and why you like playing them. If possible, give us some titles that we can look into ourselves.

I will go ahead and start up the thread.
My personal favorite Non-Mainstream game(s) is actually a very long series that has held up as an occult classic for years, and part of it recently came to light in the eyes of mainstream viewers/gamers, ultimately re-enforcing its standing. The world of Shin Megami Tensei is a very powerful series, in my opinion, and I have loved it since I first encountered the series back in 2000. My reasons for loving it are how well crafted the stories are, the fact that all of the games are interconnected in some way, many have multiple endings, the stories often have a strong dark overtone, and the fascinating use of common lore and mythology within the stories. I will always be a huge fan of this series, and love to talk about it. For those of you interested, the following is a small list of games that belong to the SMT series, that have been translated and released in the US:

1. Shin Megami Tensei: Nocturne
   
2. Shin Megami Tensei: Strange Journey
   
3. Shin Megami Tensei IV
   
4. Shin Megami Tensei: Digital Devil Saga
   
5. Shin Megami Tensei: Digital Devil Saga 2
   
6. Shin Megami Tensei: Devil Summoner: Soul Hackers
   
7. Shin Megami Tensei: Devil Summoner: Raidou Kuzunoha vs. The Soulless Army
   
8. Shin Megami Tensei: Devil Summoner 2: Raidou Kuzunoha vs King Abaddon
   
9. Revelations: Persona
   
10. Persona 2: Innocent Sin
    
11. Persona 2: Eternal Punishment
    
12. Shin Megami Tensei: Persona 3
    
13. Shin Megami Tensei: Persona 3 FES
    
14. Shin Megami Tensei: Persona 3 Portable
    
15. Shin Megami Tensei: Persona 4
    
16. Persona 4 Arena
    
17. DemiKids: Light Version
    
18. DemiKids: Dark Version
    
19. Revelations: The Demon Slayer
    
20. Jack Bros
    
21. Shin Megami Tensei Online: Imagine
    
22. Shin Megami Tensei: Devil Survivor
    
23. Shin Megami Tensei: Devil Survivor Overclocked
    
24. Shin Megami Tensei: Devil Survivor 2

As you can see there are many many games that belong to this world, Unfortunately, this is barely half of what is out there. All of the games are interconnected in some way, shape, or form with a viable timeline in place that tells of the chain of events. I highly recommend checking them out and see for yourself.

I love the smt series to death even though its edgy pokemon. Don't know if you know, but they're localizing Shin Megami Tensei on IOS which I'm kinda bummed about since I only use android. It would have been much better if they ported it to the 3ds or something.

They have been porting a lot of their game over to the 3DS, PSP and VITA as of recent. I was unaware of that news about the iOS though. Although some will call it "edgy" Pokémon, it actually began long before Pokémon was a thing. I'm not sure if you are aware of this fact, but SMT actually began as a novel back in the late 1980s by Aya Nishitani. The book is titled: Digital Devil Story: Megami Tensei.

Also: "Megami Tensei" translates to "Goddess Reincarnation" and "Shin Megami Tensei" is "True Goddess Reincarnation". Both MT and SMT belong to the same line