When comparing Alpha Centauri vs Civilization 6, the Slant community recommends Civilization 6 for most people. In the question“What are the best PC 4X games?” Civilization 6 is ranked 5th while Alpha Centauri is ranked 13th. The most important reason people chose Civilization 6 is:
The new district system introduces sprawling cities for the first time in the series and makes city planning much more interesting.
Specs
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Pros
Pro Gameplay really differs from faction to faction
Pro Great hard sci-fi storyline and setting
Pro Memorable faction leaders and philosophies
Pro Simultaneous multiplayer
When playing against an opponent in the game the players can make moves simultaneously, which means there is no waiting around for each player to take their move, which saves time as well as makes the game more immediate.
Pro Great multiplayer balance (with exceptions)
Most factions can be successfully played in multiplayer and are great on certain maps with certain strategies e.g. Builder (population or money or tech), fast attacker, hybrid, Each is unique and has it's own advantages. Only few are truly useless.
Pro Custom (modular) units
You create units yourself out of parts
Pro Deformable landscape and weather patterns
Pro Easy city planning
The new district system introduces sprawling cities for the first time in the series and makes city planning much more interesting.
Pro Civics and government system
Replacing Civ5s Social Policies is a system of Civics, researched with culture unlocking policy cards of several categories and governments with different amounts of policy card slots.
Cons
Con Looks dated
The game was originally released in 1999 and it shows, the graphics are subpar compared to newer games, though the gameplay still holds up.
Con Bad AI
The AI is not very good right now, often building obsolete units and hating player in 9 out of 10 cases.
Con Exploits
There are many exploits that still need to be ironed out, giving players a lot of ways to gain infinite money.