sci-fi battlefield, XCOM soldiers, futuristic armor, plasma weapons, alien enemies, Sectoids, Mutons, Chryssalids, tactical cover, urban ruins, crashed UFO, Skyranger, Avenger, squad-based tactics, turn-based combat, psionic powers, genetic modifications, guerrilla warfare, resistance fighters, Advent forces, procedural maps, destructible environments, high-tech laboratories, shadowy council, global resistance, strategic layer, research tree, soldier customization, permadeath, Ironman mode, cinematic camera, dynamic lighting, detailed textures, advanced alien technology, strategic resource management, base building, soldier classes, sniper on overwatch, full-body armor, helmet visor, cloaking device, chain link fence, smoke grenades, explosive environmental hazards, intense atmosphere, 3/4 view, tactical UI elements.