Estimated achievement difficulty: 9/10
Offline: 12 
Online: 1 
Approximate amount of time to 400: 30+hours [dependent on skill]
Minimum number of playthroughs needed: 1, but more likely 2
Missable achievements: None
Does difficulty affect achievements: No difficulty settings
Unobtainable/glitched achievements: 2 glitched, " Easy Does It " and "Master of the Custodial Arts"
Extra equipment needed: No
You will start this game with no intro, no information, and standing in front of the tutorial computer as the default character dustman. Enter the tutorial level and learn the basic mechanics for the game. Once you learn the controls, go out and explore the game. You have four different hubs you can enter with 12 levels in each. Which levels to do is completely up to the player. As you progress though the levels, you will learn different techniques. I will not explain these as they are fun in figuring them out. You must score double-S in each of the 48 levels in order to gain the 16 red keys. Once you have the 16 red keys, progress up to the top of the nexus and unlock the ! hub. There are 8 levels to play and you can go in any order you like. Once you have completed all single player levels with double-S, you are now considered a master of the game.
There is multiplayer within the game with one achievement to get. Please see "Spotless Shine" for more information.
If you do not unlock all the achievements on your first playthrough you will need to start with a new save and re-complete what the achievement requires.
Congratulations, you have mastered the game!
[XBA would like to thank venompimp10 for this roadmap]