With the Napoleon: Total War - Gold Edition game, you have two types of play. There is a strategy map where you manage your lands and your armies. There is also the battle map where you control your soldiers in real time and use old army tactics to defeat your enemy.
Old Fashioned War Tactics In Real Time
The Total War games feature units, equipment and weapons from the Napoleonic era, so expect a mix of gunpowder and horse units in this game. As with most of the Total War games, there are some sea elements involved. The domination of the ocean plays a bigger part in this game. If you dominate the oceans, then you have better access to the weaker areas where your armies will penetrate deeper. The Napoleon: Total War - Gold Edition has better graphics than Rome Total War, but the cross over from strategy map from the battle map seems to cause issues.
Conquer The Land And Sea
All the Total War games have had their issues, especially the impossible-to-play Empire game. It you liked the Total War Rome version of the game, then you may like Napoleon: Total War - Gold Edition because they are very similar, but the game is going to crash on you a lot. If you don't mind having to frequently restart the game, and if you liked the Total War Rome game, then give Napoleon a try.