1. Open Excel 95 with a blank worksheet
2. Go down to row 95 (that Windows 95 branding strikes again)
3. Select the whole row
4. Tab over to column B
5. Go to Help/About
6. Hold down Ctrl + Alt +Shift and click on the Tech Support Button.
7. The Hall of Tortured Souls window appears.
Once you're there, The C and D keys tilt the point of view down and up. You can walk through walls, but you need to be careful, as walls without windows can trap you inside the wall when you plough into them.
There are three levels, each with four rooms, and three pools you can walk across. On the bottom level, you appear to reach a solid wall, but behind it is a a zig-zag path. You get to the path by typing a cheat code, excelkfa, a nod to the Doom all-power cheat code IDKFA.
But there are no demons to blast into oblivion, so to many gamers, it lacks punch. When you're done exploring, X out of the box and quit Excel. You can always go back another day.