Sid Meier’s Alpha Centauri: Alien Crossfire is the official expansion pack to the acclaimed sci-fi turn-based strategy game Sid Meier’s Alpha Centauri, developed by Firaxis Games and released in 1999. Set in the 22nd century on the alien planet Chiron in the Alpha Centauri star system, the expansion builds upon the deep gameplay and philosophical themes of the original by introducing new factions, technologies, and game mechanics.

Alien Crossfire adds seven new playable factions to the original seven, including two powerful alien species—the Usurpers and the Caretakers—locked in a centuries-old war. The human factions include eco-extremists, cyborgs, and militarized religious zealots, each with unique ideologies and gameplay styles. These additions enhance the ideological and strategic depth of the game, offering even more diverse paths to victory.

The expansion also introduces new units, facilities, secret projects, and technologies, along with a redesigned tech tree that expands the possibilities for both diplomacy and warfare. The presence of the alien factions changes the balance of power and adds a new layer of narrative tension, as players must decide whether to ally with, exploit, or resist these ancient extraterrestrial rivals.

Alien Crossfire was praised for enhancing an already complex and richly layered game, deepening both its strategic and narrative dimensions. Although it didn't receive as much attention as the original game, it remains an essential experience for fans of 4X and science fiction strategy, celebrated for its philosophical depth, emergent storytelling, and bold speculative worldbuilding.

Price: £15

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