DOS Game: UFO - Enemy Unknown

As a seminal 1994 strategy main game, you lead an international organization defending Earth from alien invasion via two layers: global base management, resource allocation, and research, alongside intense, turn-based tactical squad combat. Distinctive features include permadeath for soldiers and the necessity of reverse-engineering alien tech to advance defenses. The core loop involves balancing strategic infrastructure upkeep with high-stakes ground missions against escalating threats.