I started playing Vampire Survivor on mobile last week and I'm so addicted. I know I'm late to the party. I had heard about it many times but I never played the Desktop version because I wasn't a fan of the 16-bit graphics. But a few days ago I saw it in the Play store for free and decided to try it. Wow! I'm so impressed by this little game. The game play is fun and satisfying. There are plenty of unlocks and secrets in the base game to keep you busy. Well worth a try. Once you get powered up a bit and you unlock some new characters it's really addictive.
I come back to finish off a few more unlocks every so often, and it seems like the list keeps growing. Great little game, very trippy towards the end of the “story” as well.
It really does get pretty trippy. I've been working through the secrets to unlock all the other characters. Some of them are pretty funny, others have curious quirks.