How a Retired Strategist Saved the Country is a real-time strategy simulation game developed by tomadan and published by OTAKU Plan. The player takes on the role of a retired strategist who is asked by various heroines from different countries to help them manage their armies and develop their countries. The game includes elements of resource management, building construction, and army recruitment.

The player starts with an empty land and must construct buildings to secure a population and gather resources. The game includes four types of buildings: residency, farm, lumberyard, and barracks. Residency is used to gain population, farm produces food, lumberyard is used to gather lumber, and barracks is used to recruit soldiers. The player can obtain new land by defeating enemy armies.

The game includes full audio and features cute anime girls in Live 2D. The player can enhance their army's skills with skill points. How a Retired Strategist Saved the Country is an engaging game that will keep players entertained for hours.