Who said that spreadsheet apps had to be dry and boring? Certainly not Reddit user Crruzi. As a test of Visual Basic skills, the budding programmer wrote and released an XCOM game, EXLCOM, for Microsoft Excel. That's right -- the same software you use to create charts and graphs will also let you fight invading aliens. It's not what you'd call visually rich (just about everything on the map is represented by crude squares), but it's a surprisingly thorough recreation of the game's tactical battles, complete with unique character stats and terrain you can blow up. There's even a basic level editor.