As you'll find in modern gaming, it's the indie developers who can afford to take a punt on creating something truly difficult - thus the majority of modern titles that don't mind forcing you through arduous scenarios are little 2D pixel art-topped works of wonder. There's definitely a lot of throwaway drivel when it comes to this stuff, but Cellar Door's take on a roguelike dungeon-crawler is one of the most charming and unique. Playing as an entire bloodline of knights you'll take turns inheriting various attributes from one or the other - the endgame being to conquer a castle whose layout changes every time. The excruciating difficulty comes through your limited attack reach, the overwhelming amount of enemies that fill the screen - and some of the most annoying boss designs there's been in years. Luckily there's enough humour embedded within (chronic bowel-afflicted heroes, anyone?) to keep you from breaking too many windows, providing the perfect push-pull nature to the gameplay and all the procedural unlocks within.
