Former (Control)
Control is an all-around amazing game that’s full of bizarre details, and the most shocking secrets are the massive boss fights. You’ll encounter your first boss in the spooky object-of-power storage area, where you’ll be shocked to face an enormous one-eyed monster.
There are more optional bosses in the game — you can fight an insane backwards-speaking evil doppelganger, and a psychic anchor that uses hundreds of clocks as a shield. The one-eyed monster is so unlike anything else in the game, and such a shocking encounter, it had to go somewhere on our list.
Find all the optional bosses with our full guide here.
The Collector (Dead Cells)
In 2019, Dead Cells added a truly terrifying final encounter in the Collector. Originally, the game featured a fairly simple fight against a weird brute that lead to a weirdly anticlimactic ending. As it turns out, there’s a lot more to Dead Cells — if you manage to complete even more hidden objectives and play on a higher difficulty, you can access the Astrolab from the King’s Chambers and fight the unstoppable Collector. Unsurprisingly, this guy is very difficult. Only the best Dead Cells players have a chance at reaching this guy.