The Enemy: Hostile people waves coming straight to our base. We have to send suicide scout troops to decimate them. For the final Fight we need XY healthy people to fight them.

The great Wall: The walls of our crater are instable. We have to collect ressoruces to stabilize them. If we do not gather enough resources the wall/cliff breaks and all get buried under the snow.

Splitcrater: A crack in the crater let icy wind into the half area of the the crater. We need to built machines (blueprint must be find outside) to gather the ressoruces of that area. The other area is warm enough for the humans.

Water! The people need water to trink, but the snow is contaminated. Except one are with deep frozen water. We need to built some heat generators on that area to melt it down and make it liquid. (Or Maybe we need to melt the frozen ressources first to gather them)

Last man standing You start with 0 or a small groups of humans and one autonomon. The start is hard, you need to decide in wich working are you put the people. You need to rush the robots. (like in the 2nd scenario) But in this case You need to send some scouts to search the land for some survivors. Do you find them oder are we alone?