When you start a new round of Galaxiur, you will receive 8 introduction missions to help you getting started. These missions will guide you to the right direction, but you can do anything you want. The next mission will only unlock once the previous one has been completed.
The rewards are rather small so no player will gain a significant advantage by completing the missions faster than the other. Missions are as following;
Mission: First steps
Your first mission is to research Mobile Resource Collectors and build the Mobile Extraction facility.
Reward: 5 miner colonists
Mission: Mobile Extractors
It's time to get a basic income going! Build 10 Ore Extractors and 5 Fuel Extractors.
Reward: 250 credits and 50 fuel
Mission: Increase your population
Training colonists and improving your colony is vital for survival. To Have a sustainable population you should build Food Plants to to support a larger population. Your mission is to have at least 5 Food Plants in your colony.
Reward: 10 Technicians
Mission: Secure income
Upgrade your ore refinery to level 2 to gain some basic income that can't be stolen. Someone might steal those mobile extractors.
Reward: 300 credits
Mission: Basic protection
Build 20 Vikings to protect yourself from Carry-alls.
Reward: 5 Additional Vikings
Mission: Improved Health
Improve your colony health by upgrading your Hospital to at least level 3.
Reward: 5 of each trained colonist
Mission: Join an alliance
The game is all about alliances, find a good alliance and join it!
Reward: 500 credits