1001 Spikes is one of the most difficult platformers out there. It rivals the likes of Super Meat Boy and I Wanna Be The Guy in the stupidly difficult stakes.
Whether you ever intend to play the Nicalis published retro title or not (which is currently available for PS4, Xbox One, PC and Wii U in North America), this speedrun is a sight to behold.
Interestingly, the 17.31 minutes record was achieved by Bananasaurus Rex, who you may remember as the Spelunky speedrun record holder.
He will go down in history for this one.