Zeus + Poseidon refused to work at first on my Windows 7 computer but worked fine on my windows 8 Laptop. I was getting the missing file Tutorial 1, 2, 3 etc. The issue is the game doesn't work well in widescreen. These older games were suppose to be played on a little square monitor. You aren't actually missing any files. You can either download the widescreen mod, or simply set your computer resolution to 800 x 600 while you play.


Fix:
Set screen resolution to 800 x 600.

Also may want set it to run on windows XP service pack 2 in the properties.

I hope this helps anyone still unable to play the game.