Here is the full list of all 14 Infinite - there are Beyond the Mind achievements worth 1,000 gamerscore.
Kill the Queen on Easy Difficulty
Kill the Queen on Normal Difficulty
Kill the Queen on Expert Difficulty
Kill the Queen in Co-Op Mode
Obtain the Good Ending
Obtain the Neutral Ending
Obtain the Bad Ending
Have your partner killed in front of you
Finish the game in less than one hour
Finish the game having killed less than 500 soldiers & less than 200 vehicles
Finish the game having killed more than 1300 soldiers & more than 500 vehicles
Rescue all Guardian Robots
Obtain 12 health points from finding health gems
Fall asleep in front of the Queen painting and complete the Minigame.