Here is the full list of all 44 Celestial Breach achievements.
Killed 1000 enemies.
Killed 10'000 enemies. You haven't played too much, right?
Travelled 10 Kilometers.
Travelled 100 Kilometers.
Fired any weapon 1000 times.
Fired any weapons 10'000 times.
Killed 100 Enemies with AAM.
Killed 1000 Enemies with AAM.
Finished The Game with AAM Secondary Weapon.
Killed 100 Enemies with UGR.
Killed 1000 Enemies with UGR.
Finished The Game with UGR Secondary Weapon.
Killed 100 Enemies with UGB.
Killed 1000 Enemies with UGB.
Finished The Game with UGB Secondary Weapon.
Killed 100 Enemies with SSRG.
Killed 1000 Enemies with SSRG.
Finished The Game with SSRG Secondary Weapon.
Killed 100 Enemies with SLCM.
Killed 1000 Enemies with SLCM.
Finished The Game with SLCM Secondary Weapon.
Killed 100 Enemies with AGM.
Killed 1000 Enemies with AGM.
Finished The Game with AGM Secondary Weapon.
Killed 100 Enemies with LRAAM.
Killed 1000 Enemies with LRAAM.
Finished The Game with LRAAM Secondary Weapon.
Killed 100 Enemies with AGL.
Killed 1000 Enemies with AGL.
Finished The Game with AGL Secondary Weapon.
Finished The Game with the Dragonfly on any difficulty.
Finished The Game with the Dragonfly on hardest difficulty.
Finished The Game with the Stratofortress on any difficulty.
Finished The Game with the Stratofortress on hardest difficulty.
Finished the Game with the Interceptor on any difficulty.
Finished the Game with the Interceptor on hardest difficulty.
Finished the Game with the Firefly on any difficulty.
Finished the Game with the Firefly on hardest difficulty.
Took a thousand missile hits.
Took 10k missile hits.
Healed your Teammates One Hundread times.
Healed your Teammates One Thousand times
Finished the Canyon Level on any difficulty
Finished the Winter Level on any difficutly