Community consensus on Reddit and other gaming forums ranks the expansions in terms of value:
: Strategically placing cities and greenery tiles is critical. For instance, placing greenery next to multiple cities can maximize end-game points. Terraforming Mars
In the Terraforming Mars board game, players control corporations competing to transform the Red Planet into a habitable world by managing resources and executing large-scale projects. Core Gameplay & Strategies Community consensus on Reddit and other gaming forums
"Terraforming Mars" refers to both a highly popular strategic board game and the theoretical scientific process of making Mars habitable for humans. The Board Game (2016) Terraforming Mars