Well, on Personal Computers there were 4 big series of tactical ancient wargames:
- I-Magic's Great Battles (Alexander, Hannibal, Caesar and Collector's Edition which had all of them plus the Scenario Editor and Scenario Player).
- Koios Works' Tin Soldiers (Alexander the Great and Julius Caesar)
- HPS' Ancient Warfare (Punic Wars, Gallic Wars, Alexandrian Wars and Greek Wars)
- Slitherine's (Field of Glory)
There were also some RTS versions worth mentioning:
- Creative Assembly's Total War (Shogun, Medieval, Rome, Medieval 2, Empire, Shogun 2)
- Slitherine's (Legion and Legion Gold, Chariots of War, Spartan, Troy, Legion Arena, The History Channel Great Battles of Rome)
- Longbow Games' Hegemony: Philip of Macedon
(Ubisoft's Alexander, Ensemble Studios' Age of Empires and World Forge's Ancient Wars: Sparta and some others are not really worth mentioning in this context, as they were mostly just using an ancient setup)
I've played all of them, and of them all, GBCE is by far the better in recreating the ancient battlefield. HPS's Ancient Warfare are good, even if very complex, but are simply destroyed by a horrible interface. FoG has potential, but is still far away from GBCE.
Ian's GBCE site is still up, and as far as I know, the Scenario Editor and Scenario Player are still in ther to be downloaded, and will allow you to play any of the custon scenarios you'll get from his site. GBCE is very hard to find to be bought, as it was produced like more than 10 years ago, and unfortunately, it has its limits and bugs too.