Free army lists and Scenarios for Centuria:

Spartans

Athenians

Thebans

Syracusan

Classic Indians

Mauryan Empire

Late Achaemenid Persians

Macedonians

Late Republican Romans

Gauls

Dacians

Parthians

Early Germanic Tribes

Celtiberians

Late Sarmatians

Sassanid Persians

Picts

Huns