Here is the full list of all 31 Orbox C achievements.
Beat the Easy pack levels
Beat the Average pack levels
Beat the Normal pack levels
Beat the Hard pack levels
Beat the Easy 2 pack levels
Beat the Speed pack levels
Beat the Bonus pack levels
Brake the orbox 50 times
Brake the orbox 200 times
Brake the orbox 500 times
Blow 100 bombs
Blow 300 bombs
Blow 1000 bombs
Activate 50 sensors
Activate 150 sensors
Activate 500 sensors
Break 100 of ice
Break 300 of ice
Break 1000 of ice
Close 50 gates
Close 150 gates
Close 500 gates
Collect 100 stars
Collect 300 stars
Collect 1000 stars
Grow 100 blocks
Grow 300 blocks
Grow 1000 blocks
Teleport 100 times
Teleport 300 times
Teleport 1000 times