On today’s list of obscure games I‘ve found years ago and randomly remembered exist:
Penumbear
a puzzle platformer for iOS released in 2013
in which you played as a cute little bear and have to navigate him though the levels with the help of light and shadows- meaning: by using light to cast shadows, you were able to use the line between light and shadow to literally walk on light and solve puzzles while trying to survive all the dangers of this atmospheric, gritty dark world.
The game was quite long, had a lot of secrets (including secret areas and collectibles in the form of teddy bears) and was incredibly challenging.
It is also (to my knowledge) sadly no longer available, and hasn’t been so for years.
However, it managed to get popular enough to warrant it‘s own Wikipedia-Page (which is incredible considering this was not only an Indie-game, but one for mobile) so at least it won’t be completely forgotten: https://en.m.wikipedia.org/wiki/Penumbear
Penumbear - Wikipedia












