Here is the full list of all 10 SHOCK TROOPERS 2nd Squad achievements.
Throw 100 grenades (2nd weapon)
Play with all characters
Complete a stage with full life
Complete the game dying more than 40 times
Use all the weapons
Throw 500 grenades (2nd weapon)
Complete the game in multiplayer (local or online)
Reach a score of 5,000,000 points
Complete a stage without dying
Complete the game using less than 10 credits