Here is the full list of all 20 Microsoft Allegiance achievements.
Pick up a pod.
Played in one or more games during the pre-launch beta test between 9/5/17 and 9/16/17. Thanks for helping us shake out the bugs!
You got your first miner kill. Now go get the rest!
You got your first constructor kill! Team work makes it happen!
Force an enemy pilot to eject.
Your first base kill. This achievement was a lot easier than trying to get that mounted.
You captured an enemy base! Party like you stole it!
Getting the hang of it yet? No? Yeah that is expected.
Achieve Rank 10
You brought tech back to your base. How nice you are to share with the team.
Kill an enemy probe. It's not personal, you just don't want them to see the bomber that's right behind you.
Your probe spotted a high value enemy target!
Your nanite cannon repaired the hull of your target. Keep those miners alive and bombers flying!
Get picked up in a Pod.
Spot an enemy Garrison.
Force 100 Pilots to Eject
Kill 50 Miners
Win 10 Games
Win 50 Games
Win 100 Games