Not sure if anyone's still alive here... place is like a graveyard.
Edit: Referring to Alexander the Great, by the way.
Edit2: Since there's a lot more interest than anticipated, adding some guidelines:
1: Alexander has to act in character; unless there are very convincing arguments otherwise, Alexander's decisions are impetuous, emotional, and he would rather win it all or lose it all than settle for less.
2: Alexander's army cannot grudgingly march on while secretly hating the campaign; morale is high, as it usually was, with Alexander personally visiting the troops before every major battle and giving pretty much every platoon a specialized pep talk that kept them loyal and enthused.
3: Prior to the Joke round, Alexander the Great is the historical Alexander and cannot access his divine powers as described in the Romance of Alexander; however, he is as good a fighter as he is historically, typically leading from the front; conversely, you could argue that Alexander has the potential to be killed in battle, but don't just go "lol a stray arrow from a derp archer hits Alexander right in the eye an he ded lol". At least provide some argument for why Porus' archers would have been able to penetrate Macedonian linothorax, unlike previous bows, and also explain why this development would have caught Alexander by surprise and how he might have deployed his companion cavalry at the wrong time and the wrong place so that he was killed. (I suppose an argument could be made that Bucephalus' death impedes Alexander's ability to fight).
Okay, that's it for the rules, I think...
Main Round: Alexander does not stop at the Ganges and the Battle of Hydaespes River, and continues to fight; companion cavalry and other troops have high morale, but are not otherwise different historically.
Secondary Round: Alexander now also has his insane streak of luck as shown in the Siege of Tyre and the Battle of Gaugamela; he gets rewarded by pretty much every risky and borderline insane strategic and tactical decision, as was typical to his prior experiences.
Tertiary Round: It is assumed that Alexander's aging, and Bucephalus' death in combat, have made him a bit less hotheaded; he is now more willing to use his excellent skills of diplomacy and compromise to get what he wants. Does this help him, or does this impede him compared to Rounds 1 and 2?
Joke Round: Alexander the Great has all the feats from the Romance of Alexander; conversely, any heroes living in his own age also have their own abilities as described in their legends / romances. How does Alexander fare against his fellow heroes, based on feats? Can he and his army conquer the world? Or is there some hero of his time that can hard-counter Alexander?