The Sun and Moon

System Six consists of levels 91 - 100 plus boss level VI. Remember that there is no time limit for completing levels for this achievement, so take your time so you don't die needlessly over and over.

System Six introduces you to moving spikes. They always move in set patterns, so timing is pretty easy to work out. There's nothing overly complicated in this system, just remember to take your time to ensure you time all of your jumps and phases appropriately so you don't hit the moving spikes. The boss battle consists of the boss chasing you, but this time he has two spikes that rotate around him, making him more dangerous. You can jump between the spikes and him though, so keep that in mind.

Upon completing all 10 levels and boss level VI, the achievement will unlock.