Here’s a page with some errata and clarifications for Warhammer Ancients’ Alexander The Great book.
Andy Watkins has one page set of rules for games involving Roman gladiators. You can use the fine Wargames Foundry 28mm Gladiators to fill your arena.
Hoplites is a free computer card game based on the excellent GMT board game SPQR. I’ve played it and its a lot of fun. The card layout is reminiscent of the play in Columbia Games’ Gettysburg and Eagles games. There are also Samurai and Conan expansions. It’s an excellent diversion when you can’t get out your miniatures. Download the game here.
Jim Naughton has written a set of campaign rules for DBA
about the last stage of the Roman Republic. In it, each player will represent a Praetor, the second rank of Roman senior magistrates, and the lowest rank empowered with Imperium, the power to command Roman armies and exercise governorship of a Roman province. Eventually some praetors will advance to the rank of consul, and occasionally dictator. Ultimately the goal is to amass sufficient prestige to stand unchallenged as First Man in Rome.
Hat Tip: Rich Baier
Ancient Battlefields is a set of free wargames rules "with an emphasis on Command and Control". The game is over when the opposing general flees the field.