This was the first really difficult game that I ever beat. They totally cranked that difficulty meter from the previous games and made this an ahead-of-its-time murderfest akin to Super Meat Boy. The good news is that rather than repeating the levels on death like all previous games in the series, this one gives you actual checkpoints and lots of them. Also infinite lives. So the incredibly tough levels can be tackled one segment at a time. There are no difficulty levels, but the difficulty is just right, and they pretty much got it perfect here. Though be prepared that this game does take a while to get through if played fully legit, and every stage is a fierce battle.