For the best Napoleonic tactical gaming series see La Bataille de Preussich-Eylau, La Bataille de Les Quatre Bras, and others from La Bataille series by Clash of Arms. link and link and see The Gamers (now with MMP Multiman Publishing and no new games on the horizon :( ) Napoelonic Brigade series (uses written orders very creative and realistic recommended see link
For Napoleonic Operations see Kevin Zucker's (OSG) CoN x 1 and x 2 series – the best operational napoleonic games available.
CoNx1 (Campaigns of Napoleon first series) link
and Campaigns of Napoleon 2nd series link
There is a Campaigns of Napoleon series 5 currently with one game and sadly oop link second hand copies reaching hundreds of dollars!
Also see Kevin Zucker's Day series (between the CoN operational series and the grand tactical NLB series) such seven Days of 1809.
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For grand tactical Napoleonics see Kevin Zucker's Napoleon's Last Battles series namely TLS (The Last Success) TCS (The Coming Storm)
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and link
and try Markus Stumptner's rules versions extend NLB series even more link
I would highly recommend picking up something like Habit of Victory covering the Operational campaigns of 1806 / 1807 and The Coming Storm covering at a grand tactical level the battles of 1806 / 1807. You can then play out the campaign and experience the issues faced by the coalition and the French when campaigning, then move to fighting the battles of Eylau or Friedland, Jena etc
There are also some very good one off battles like Napoleon's Triumph and Bonaparte at Marengo by Simmons games. link and link
L'Armee du Nord by Clash of Games is a good game for the camapign of Waterloo. link
Oh, lastly Austerlitz by GMT very good game system and a unique way of portraying large units, link
if you cannot get hold of La Bataille Austerlitz by Marshall Enterprises (with current asking price of $1,000 USD+!!!) link