SEP has published a few lines that may be of interest, and you can find a page devoted to each.
Centurion: Legionaries of Rome has characters serving under the eagles of Rome in her famous legions.
Nefertiti Overdrive is about high-octane, wire-fu action set in Ancient Egypt and includes a series of adventures that tell a longer story.
Sword’s Edge is a generic system for which multiple adventures in different genres are available.