There are 31 civilisations in Age of Empires II:
- Aztecs
- Berbers
- Britons
- Burmese
- Byzantines
- Celts
- Chinese
- Ethiopians
- Franks
- Goths
- Huns
- Incas
- Indians
- Italians
- Japanese
- Khmer
- Koreans
- Magyars
- Malay
- Malians
- Mayans
- Mongols
- Persians
- Portuguese
- Saracens
- Slavs
- Spanish
- Teutons
- Turks
- Vietnamese
- Vikings
In the map editor, create a scenario with 8 players.
Change the civilisation of Player 2 to Player 8 so all seven are different (e.g. Player 2 is Aztecs, Player 3 is Britons, Player 4 is Byzantines, …). The civilisation of Player 1 doesn't matter.
Place 1 Archer for Player 2 (Red), 3 (Green), 4 (Yellow), 5 (Cyan), 6 (Purple), 7 (Gray) and 8 (Orange) and surround them with 56 Arbalests for Player 1 (Blue).
Test the scenario.
Do it 5 times (each time changing the civilisation of Player 2 to Player 8) so you cover all 31 civilisations.
1x Archer for Player 2 (Red), 3 (Green), 4 (Yellow), 5 (Cyan), 6 (Purple), 7 (Gray) and 8 (Orange)
and 56x Arbalest for Player 1 (Blue)
As there is a separate achievement for each civilisation, you can check your progress.