Gangs of Rome is a new miniatures game of street fighting in Ancient Rome (yes, it was a thing). It’s actually a game I have thought about for years, going back to several books I read describing Roman politics as a blood sport. The rules are free for now, and there are dedicated miniatures and other things you can buy. Check out their Facebook page.
Rules: Ancients
Legio Quaternarius Ancients Rules
Legio Quaternarius is a set of free wargames rules for ancients. It is played on a square gridded table.
WRG Ancients 7th Edition
WGR Ancients 7th Edition is available for free as a pdf download.
Roma Victa “Pulp” Rules For Ancients
If you scroll down on the Lead Adventure thread at the link, you will find a simple set of free wargames rules and a skirmish scenario for Late Roman “Pulp” Adventure.
Gladius and Pilum Ancients Rules
Gladius and Pilum is a set of free wargames rules for battles set in the 500BC to 500AD era. They’re designed for 15mm miniatures, with one figure equaling 50 men.