I've posted a list (with descriptions) of the battles included in Greek Wars.
Also on the blog is a list of all the engine improvements made to the series.
Paul is very good at adding new features, improving gameplay, and fixing bugs
with the engine with each new title released. All the previous titles will be
patched to the latest version of the engine in the not too distant future, well
that's the normal pattern at least.
Here is a link to my blog:
http://albert-amos.blogspot.com/