Accountants and Excel go together like peanut butter and jelly. But
Cary Walkin from Canada came up with a way to add fun to the program by
creating full RPG game inside called Arena.Xlsm.

The gameplay includes your usual RPG stuff like random enemies and items, bosses, levels, spells, achievements and bosses.
The game currently works with Excel 2007 and 2010, but
hasn't been tested with Excel 2013 (we're crossing our fingers). Sadly,
the Mac version of Excel is still in the works. Try
downloading it here, but make sure you don't get caught by your own boss.
[
BoingBoing]