Fairly straightforward, there are 20 Mission Achievements for completing the main "Farsite Expedition" tree.

There are 6 Objective achievments, 5 possible in Farsite Expedition and 1 in Span Experiments



Lore, complete all story missions. Done via finishing Farsite Expedition tree




Reclaim, take over a certain amount of land, shown as a percent




Collective, gather the required item on the map




Nullification, successfully suppress all of the enemies on the map




Totem, active all of the totems on the map at the same time







Hold, keep an asset alive for the required time.
For an easy map do this on Shaka, expand right quickly and there should be sufficient power to hold off all fronts

Achievements for secret objectives



Parallel Universe



Activate easter egg in 1st story mission.

Achievement image gives a big clue...

Play the first mission, the one where the alarm wakes you up, destory the HQ in the creeper.

Mildly tough fight when you do so, F5 quicksave recommended




21 Gun Salute



Activate easter egg in 'Before Time'

Achievement image gives a big clue...

Go to the Span experiments, find before time and build 21 snipers. Mission finish not required




Farsite Farside




Achievement image gives a big clue...

On second story mission, connect the temple in the top right to the energy source in the bottom right