Most challenging game you have ever played

[Veknoid_Outcast]

The Fury said:
I know some people will say Bloodborne or the Dark Souls games but once you are used to the gameplay, are they really that challenging?

For me the most challenging are Driving games. Unlike most games, they require absolute perfection to be able to win, get the best time, whatever. I'm a big fan of WipeOut, to be able to do the turns needed in that game at the highest speed while fighting off other opponents... get it right and it holds a great deal of satisfaction.

Hear, hear. Making those turns at break-neck speed in Wipeout is sooo satisfying. Sigh, I wish we could get a new Wipeout game. I adored 2048.

@OP: As difficult as games like Ninja Gaiden (2004) and Demon's Souls are, they're beatable. I cannot, for the life of me, finish Ghosts 'n Goblins, Ninja Gaiden (1989), Top Gun, and Castlevania III.