Here is the full list of all 25 Voice Commander achievements worth 1,000 gamerscore.
Destroyed 100 000 enemies
Built 500 Laser Turrets
Built 500 Shock Turrets
Built 500 Rocket Turrets
Used 40 abilities in a row while never having a full tank
Beat Wave 40. How?
Destroyed 25 000 enemies
Built 100 Shock Turrets
Beat Wave 30. I'm stunned - how did you do that?!
Killed 60 enemies with a single Vox blast
Built 100 Laser Turrets
Killed 60 enemies with a single nuke
Built 100 Rocket Turrets
Destroyed 5 000 enemies
Destroyed a friendly player ship
Trapped 50 enemies with a single gravity bomb
Beat Wave 20. You're getting the hang of this!
Made it to wave 20 without player ship dying
You beat the mothership without letting Vox die
Made it to wave 10 without taking ship damage
Killed 60 enemies with a single shockwave
Defeated the Mothership!
You beat the mothership without using a Nuke
Beat Wave 10. I would say I'm impressed, but I’m not.
Graduated from the Academy