I lack a better title. The topic for this thread is very, very wide.
Horror games, strange games, and so on. But it doesn't stop there! This expands to horror or unexpected elements you didn't expect to see in normal games! Maybe you boot up the game you like one day, and you get some type of bug that absolutely floored you, Maybe a nice relaxing game has some implications that send a shiver down your spine, You'll never be able to get off of mr bones wild ride!
This is also not a general thread, nor is the goal to take over preexisting threads, if you want to make a thread for a specific game, go on and do it!