Halo Wars Progress Tracker

There are 50 achievements in Halo Wars that span 15 campaign levels, 14 skirmish levels, 6 leaders, skulls, black boxes, local play and Xbox Live play. I've created a tracking workbook in Microsoft Excel 2007 format that allows you to track your progress easier and give you a better idea of how to get your achievements as quickly as possible.

Version 1 is posted here. Feedback is welcome.

[Update March 10, 2009] Version 2 is posted with bug fixes and improved progress tracking.
[Update March 12, 2009] Version 3 is posted with bug fixes and full tech tree with resource costs.