[Alekanekelo]

Achievements might work as motivation for some but it can also easily divert attention from work to simply 'hunting' achievements especially if you are competing with colleagues.

With the example of the visual studios achievements (http://channel9.msdn.com/achievements/visualstudio) that a few has already posted here, there are even achievements 'just for fun' that doesn't exactly encourage productive work. For example the 'Go To Hell' achievement for using a goto statement.