Age of Castles (Series)!

Age of Mythology is based on building towns, gathering resources, creating armies, and ultimately destroying enemy units and buildings. In this way, players are able to defeat and conquer rival towns and civilizations. Players advance their tribe through four "Ages": starting in the Archaic Age, the player may upgrade to the Classical Age, the Heroic Age, and finally, the Mythic Age. Each upgrade to a higher Age unlocks new units and technologies for the player, which strengthens their settlement. »

Free (as in freedom) open-source RTS http://alternativeto.net/software/age-of-empires-iii/ engine. Written from scratch in C++14 and Python, using OpenGL + GLSL.

As a provincial governor charged with spreading the glory of Rome your mission is clear – build cities, foster trade and industry, make money. How you accomplish this is up to you. Gain wealth and power, make a career out of pleasing the emperor, battle barbarians and repel invaders, or concentrate on building the next Eternal City. Fail and you'll end up as lunch for the lions. Prove your strength of mind and spirit and you just might be crowned Caesar!

Empires! is a real-time strategy game about building and ruling a historical empire.Beginning with a small village, your task is to build a large, flourishing empire!Take control of your citizens and guide them to gather resources, construct new buildings and research new technologies. It may not be easy to survive the first days when your town is taking it´s first steps, but as your city grows you will definitely face new challenges when ruling a large empire. Try yourself if you are able to build thegreatest empire of all times! »