Here is the full list of all 19 Byte Lynx achievements.
In mission Back Door, use one enemy to "back door" the other
Beat mission Harmony.REC without a single Triplex being destroyed or demolished
Cut off power to 100 enemy buildings at once
Construct 2000 buildings
During mission Sympathizer, destroy the Purifier's HQ before he can retreat
Capture 2000 buildings
Construct 100 buildings
Construct 500 buildings
Capture 500 buildings
A journey begins
Defeat a great evil
Beat the mission Impact without destroying Jeltz's HQ
Beat the mission Retaliation on Expert difficulty
Beat mission Lost Cause in less than 5 minutes
Beat Traitor on Expert difficulty
Beat Death's Heart without Gossemer's HQ taking damage
Beat Wanted on Expert difficulty
Beat mission Invasion in less than 5 minutes
Beat every level on Expert