🕶️ An aerial view of a camp on a plain protected for the most part (notably its power plant) by a semi-transparent anti-missile dome. On the ground, combat units are moving away to the east, and in the air, a ship is approaching from the northeast. Numerous ground-to-ground and ground-to-air cannons surround the camp. 📚️ Zero-K is a (partially, see Wikipedia for the sound: CC BY-NC-ND) libre, multi-platform, single-player / multi-player RTS game with a sci-fi theme, a simple economy based on metal & energy, and featuring classic gameplay (4X for map supremacy) or tower defense (vs. increasingly powerful waves of monsters). The player starts with a mecha, extracts resources, builds his army and faces adversity on land, air & sea. A mature game designed by and for gamers, with 70+ missions, 100+ units, a clear interface, and an accomplished lobby client (solo/multi up to 32 players, co-op vs. other players and/or AIs, PVP, campaigns, content & player rating, content loading, fine tuning, ...). Fantastic!