Image from the three legacy . Used with permission.
This post is not financial advice.
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Three Legacy is a new game from 
I wish I knew more about this game and could write a full strategy post. but I am just..kinda winging it for now. It seems simple at first but there are strategies that will likely come into play later on in the game. The characters are aliens. Yes the game is based on "3".
Official explainer post
There is a basic tutorial in game so you can get started. It is not a free to play game (yet) but you can start with as little as $1. I purchased the $10 pack to get started and made some smaller additional purchases totaling $12 as of this moment.
Basically it's aneconomic strategy game. Usually with games like this it takes me a while to develop a strategy , especially when there are multiple moving parts. I also adapt and change my strategies frequently.
There is also a passive (or mostly passive)path to the game once it gets going. Me personally all I am doing right now is birthing aliens (when possible), doing quests/search for blueprints and building some buildings. That's pretty much all there is to do right now. I am building the foundation and will think of real strategies later.
I still have some reading to do before I understand all of it. Even then I probably still will be scratching my head for a while.
There is a cool down for everything but once you have more aliens, it gets easier because you can send multiple aliens on quests etc.
If you are interested in checking it out and want to be in my household, please feel free to use the links in this post