Hello again! I'm Lyubo the lead designer of Surviving Mars: Relaunched and I'm here to talk about the endgame of your colonies. Surviving Mars at its core is a sandbox game and does not have a clear final objective and you are free to pursue your own goals. However, during the years, we have added challenges for those who have mastered the game.
Let's talk about the more obvious goals at the end of the game - scanning all sectors and exhausting the tech tree. At the end of the game, you will be able to unlock many breakthrough technologies through scanning. One thing we changed is that now, when exploring anomalies, you have a choice of three possible breakthroughs that can be unlocked. These technologies will greatly change the way you play the game and will offer unique bonuses.
Apart from that, at the end of the tech tree you will unlock a lot of Wonder buildings that solve some the problems you have had since sol 1 of your colony. Tired of searching for new concrete deposits? Build an Excavator or melt waste rock produced in your other mines to make it into concrete. Need metal (both normal and rare)? Build a Mohole Mine. Need additional research to finalize the tech tree? The Omega telescope is your friend (it also unlocks more of those sweet breakthroughs). Need a huge dome? The Geoscape dome is your solution (or if you have terraformed Mars, the Capital City is an excellent choice as well).
Each of these wonders solves a huge problem you may have had up until this point and make your colony that much better. But there are new ways to solve problems as well - some of the final laws offer you new ways to solve problems as well. There is a set of laws that will allow you to never run out of exotic minerals (if you also have an Asteroid Catcher to keep those pesky asteroids in orbit).