A Feudal Age opening built around Scout Cavalry from the Stable, often called Scouts. Scouts are fast and cost only food, so you can make them without mining gold.
Scouts raid woodlines and gold, kill stray villagers and push the opponent off the map. They lose to Spearmen and to villagers working under a Town Center, so the scout player wins by moving faster than the opponent can react, then usually moves on to Knights or a Fast Castle.