Here is the full list of all 23 Spacecraft Tactics achievements.
Complete the tutorial
Join a game on an official server
Complete the campaign on Easy
Complete the campaign on Normal
Complete the campaign on Hard
Complete a speed run
Complete a race
Win a match in the PvP arena
Defeat all enemies in PvE battles
Save the mining ship
Destroy the scout portal
Find a new outpost location
Delay construction of the new portal
Relocate the outpost
Defeat the princess
Defeat the pirates king