I have the computer version of their Rommel game, it is fun. Slitherine's Hannibal, Rome vs. Carthage is fun as well; plays on the computer so takes less room in the house. I wish that FC Napoleon and Alexander were both available on computer.
I had no idea that some of them were also available for the computer!
The only issue I have with the Napoleon one, is that the maps get really crowded with all the units. I ended up making my own group markers and duplicating them, and just use group markers on the maps and then have the respective duplicate group marker off to the side, with the units under the marker so I can see what units are associated with each group marker on the map.