NHL 2K10
50 Achievements
1,000
Xbox 360
Thrashers Trophy
Clean 95% of the ice surface with the Zamboni.
5
How to unlock the Thrashers Trophy achievement in NHL 2K10 - Definitive Guide
this achievement is actually really easy to get.just start by doing the outside of the rink and work your way in and go after places that you missed when you have cleared most of the rink.
Hard to describe the pattern for this, so follow this video. Even though this video is for NHL 2K9, it's still the same strategy.
This is a pretty tough trophy because you have to clean almost all of the ice surface and it isn't easy to control the Zamboni. The following video will show you how to achieve it, credit to nitty30fan for it: