Could anyone provide some information about this game please?
- What is the general course of play?
Players do a naval turn with alternating segments for each player then land movement and combat are done by players in an order determined by scenario.
- Is it only war or also administration and economy?
It is war and some economy management. Mostly just that provinces controlled have a tax value you get money from, and certain regions provide different units for recruitment.
- How are the battles resolved?
Simple D6 die roll with modifiers. There are some things you can do to improve odds, like having defensive terrain, better leaders, better force compositions (optional rule).
- Is there a campaign game which covers the whole period of
the Roman Empire or just specific wars?
Just specific wars. A lot of folks have tried to figure out what a campaign game might looks like but it'd be very long and tedious and complex rules to govern weird things. So probably wouldn't be very fun if attempted.
- How log does a game last (turns/hours)?
Hard to say, several hours at least. Scenarios vary in length though. Still even the long ones sometimes have victory conditions or situations where a game can be called early.
- Are there multi-player scenarios and if so, are the sides
fixed or ist there also an element of diplomacy?
There are definitely multiplayer scenarios. For the most part diplomacy is player based. so you can form a temporary alliance and such, if the players agree. Wheeling and dealing is an element.
Maybe there is somewhere a review on this game?
Not for the new version. I'm holding back my review until more errata is confirmed and provided. Right now I personally think the game is good but marred by some issues that errata will resolve. If that errata is never provided due to publisher abandonment (I don't think this will happen, btw) I'd maybe give a negative review because of the game state. Once the issues are resolved though I think this will be a solid game and edition.