Here is the full list of all 21 Lambda Wars Beta achievements.
Win 100 Destroy HQ matches.
Defeat 100 enemies in Annihilation games.
Blow up 100 enemy buildings with Saboteurs in Destroy HQ or Annihilation mode.
Win 20 Destroy HQ matches.
Win a Combine vs Rebels game in a 4v4 match of Annihilation or Destroy HQ.
Defeat 20 enemies in Annihilation games.
Kill 300 units with Suppression Device in Annihilation or Destroy HQ game mode.
Build 20 Striders.
Make your 50 very own zombies!
Kill 5 different units with one combine ball.
Kill Dog.
Build 20 Dogs.
Complete the mission for Valley.
Complete the mission for Radio Tower.
Reprogram a Floor Turret with a Saboteur and kill an enemy unit with it.
As Rebels, kill 10 units with one grenade.
Complete the mission for Waste.
Complete the mission for Abandoned.
Win an Annihilation game.
Collect 50 Partisans together in Annihilation or Destroy HQ mode.
Complete the Tutorial level.