Here is the full list of all 37 Solar Struggle achievements.
Achieve 1000 kills in skirmish mode.
Obtain ten million points in one skirmish game
Obtain ten thousand hits.
Obtain five million points in one skirmish game
Put a laser cannon into each slot of your ship in skirmish
Destroy the first destroyer in skirmish
Reach wave 5 in skirmish.
Obtain one million points in one skirmish game
Achieve a 8x-multiplicator in skirmish
Achieve a 5x-multiplicator in skirmish
Achieve 100 kills in skirmish mode.
Improve a weapon or system in skirmish
Achieve a 3x-multiplicator in skirmish
Put a gatling cannon into each slot of your ship in skirmish
Destroy your first boss enemy in skirmish
Play skirmish for the first time
Complete mission 1
Complete mission 2
Complete mission 3
Complete mission 4
Complete mission 5
Complete mission 6
Complete mission 7
Complete mission 8
Complete mission 9
Complete mission 10
Complete mission 11
Achieve 10000 kills in skirmish mode.
Complete the campaign.
Obtain one hundred thousand hits.
Obtain one million hits.
Reach wave 10 in skirmish.
Reach wave 20 in skirmish.
Put a plasma cannon into each slot of your ship in skirmish
Achieve 85% accuracy in the first mission
Finish the asteroid course in the first mission in under 19 seconds
Obtain only 10% accuracy in a mission