Alpha Centauri is a 1999 PC (DOS / Windows) game from Firaxis, catalogued here for 8 defining game mechanics.
PC (DOS / Windows)1999Complexity 86/1002D IsometricCult classic
Sid Meier's Alpha Centauri is a 4X video game, considered a spiritual sequel to the Civilization series. Set in a science fiction depiction of the 22nd century, the game begins as seven competing ideological factions land on the planet Chiron ("Planet") in the Alpha Centauri star system. (via Wikipedia)
The game mechanics of Alpha Centauri
Economy Buy SellResourcePlayer earns and spends currency at merchants; price and value decisions are meaningful.
Resource HarvestingResourcePlayer or AI units collect raw resources from the world that fuel construction, production, or advancement.
Upgrade PurchasingResourcePlayer spends accumulated resources or currency on permanent stat or ability improvements chosen from a menu.
Research TreeProgressionSpending accumulated resources or turns on a branching tree of options unlocks new units, buildings, or abilities.
Dialogue TreePuzzlePlayer chooses from branching conversation options; choices affect relationship state, information revealed, or world flags.
Tile Map WorldWorldWorld is built from a grid of discrete terrain tiles; position on the grid is the primary navigation primitive.
Faction AiSimulationMultiple AI-controlled factions autonomously pursue goals and interact with each other and the player simultaneously.
Simulation TickSimulationWorld state advances on a regular clock independent of player input; player decisions are responses to the advancing simulation rather than…
Each mechanic links to how to build it in Godot, with the retro games that share it.
Study the source
Open-source reimplementation (AGPL-3.0). GLSMAC is an unofficial OpenGL/SDL2 reimplementation of Alpha Centauri that loads assets from an existing original game install. https://github.com/afwbkbc/glsmac