Full list of all 20 Mass Effect: Infiltrator achievements worth 200 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Windows Phone.
You finished the Bonus missions
You completed the game
You completed the Paragon ending
You fully upgraded a skill
You alternated Body Armor and / or Helmet in any level at each Checkpoint
You defeated X1
You fully upgraded a weapon
You obtained 30 pieces of Intel
You collected 1000 credits from terminals/vaults
You executed a chain kill of 5 or more enemies
Unlock all equipment
You unlocked all skills
Upgrade all Abilities, Biotics and Melee skills
Obtain a 3 star rating for Time on 15 separate occasions
Obtain a 3 star rating for Style 15 times
Obtain a 3 star rating for Health 15 times
Complete the Renegade ending
Obtain 15 Veteran statuses after a Checkpoint
Achieve a style rating of 30 or more in a single battle/checkpoint
Perform 25 headshots with the Sniper Rifle