Glest is a free 3D real-time cross-platform customizable strategy game. The team that created it is based in Spain.
The game is set in a period reminiscent of the Middle Ages and contains two playable and customizable factions, Magic and Tech. Since the release of version 2.0 there have been many changes, including new units, upgrades, and an overall expansion of the game. Version 3.0 added online play over LAN/Internet.
It has a fairly large community, with custom maps, units, and mods.