First Person Tetris
Tetris most likely has more releases, tweaks, and variants than any other game, but First Person Tetris is the most ridiculous of them all.
The game is almost unplayable for me, but its concept is wholly unique and it really isn’t first person, it’s like Tetris Block Orientation Picture in Picture style Tetris. Yeah weird, and hard to explain. Just give it a try and see what you think.