Sid Meier's Alien Crossfire

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Sid Meier's Alien Crossfire expands the sci-fi strategy world of Alpha Centauri with new missions, factions, and tech. Players take control of one of several groups vying for dominance on a distant planet. Each turn involves managing resources, building bases, and researching advancements while fending off alien threats. The turn-based combat mixes tactical unit placement with long-term planning. Multiplayer modes let friends or foes compete in head-to-head matches or team-based clashes. The game stands out for its deep strategic layers and replayability. Its blend of resource management, base defense, and evolving tech trees earned it a cult following over the years. With a 84/100 score on Metacritic, it's often cited as one of the best strategy expansions of the late 90s. The alien invasion mechanic adds urgency to every decision, pushing players to adapt or face collapse. Over two decades later its maps and mechanics still show polish.