Lunacid. Basically take vaporwave, king's field, shadow tower(pre-dark souls fromsoft games) and PS1-style aesthetics, give it a good whisking, and out comes Lunacid. This game rocks and I've been having a blast playing it! 
Here's a random video talking about it, since I'm of course gonna shill games I enjoy

Here's a random video talking about it, since I'm of course gonna shill games I enjoy

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